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"use strict";
/**
* Copyright 2019 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
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if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ElementHandle = exports.JSHandle = exports.createJSHandle = void 0;
const assert_js_1 = require("./assert.js");
const helper_js_1 = require("./helper.js");
const QueryHandler_js_1 = require("./QueryHandler.js");
const environment_js_1 = require("../environment.js");
/**
* @internal
*/
function createJSHandle(context, remoteObject) {
const frame = context.frame();
if (remoteObject.subtype === 'node' && frame) {
const frameManager = frame._frameManager;
return new ElementHandle(context, context._client, remoteObject, frameManager.page(), frameManager);
}
return new JSHandle(context, context._client, remoteObject);
}
exports.createJSHandle = createJSHandle;
/**
* Represents an in-page JavaScript object. JSHandles can be created with the
* {@link Page.evaluateHandle | page.evaluateHandle} method.
*
* @example
* ```js
* const windowHandle = await page.evaluateHandle(() => window);
* ```
*
* JSHandle prevents the referenced JavaScript object from being garbage-collected
* unless the handle is {@link JSHandle.dispose | disposed}. JSHandles are auto-
* disposed when their origin frame gets navigated or the parent context gets destroyed.
*
* JSHandle instances can be used as arguments for {@link Page.$eval},
* {@link Page.evaluate}, and {@link Page.evaluateHandle}.
*
* @public
*/
class JSHandle {
/**
* @internal
*/
constructor(context, client, remoteObject) {
/**
* @internal
*/
this._disposed = false;
this._context = context;
this._client = client;
this._remoteObject = remoteObject;
}
/** Returns the execution context the handle belongs to.
*/
executionContext() {
return this._context;
}
/**
* This method passes this handle as the first argument to `pageFunction`.
* If `pageFunction` returns a Promise, then `handle.evaluate` would wait
* for the promise to resolve and return its value.
*
* @example
* ```js
* const tweetHandle = await page.$('.tweet .retweets');
* expect(await tweetHandle.evaluate(node => node.innerText)).toBe('10');
* ```
*/
async evaluate(pageFunction, ...args) {
return await this.executionContext().evaluate(pageFunction, this, ...args);
}
/**
* This method passes this handle as the first argument to `pageFunction`.
*
* @remarks
*
* The only difference between `jsHandle.evaluate` and
* `jsHandle.evaluateHandle` is that `jsHandle.evaluateHandle`
* returns an in-page object (JSHandle).
*
* If the function passed to `jsHandle.evaluateHandle` returns a Promise,
* then `evaluateHandle.evaluateHandle` waits for the promise to resolve and
* returns its value.
*
* See {@link Page.evaluateHandle} for more details.
*/
async evaluateHandle(pageFunction, ...args) {
return await this.executionContext().evaluateHandle(pageFunction, this, ...args);
}
/** Fetches a single property from the referenced object.
*/
async getProperty(propertyName) {
const objectHandle = await this.evaluateHandle((object, propertyName) => {
const result = { __proto__: null };
result[propertyName] = object[propertyName];
return result;
}, propertyName);
const properties = await objectHandle.getProperties();
const result = properties.get(propertyName) || null;
await objectHandle.dispose();
return result;
}
/**
* The method returns a map with property names as keys and JSHandle
* instances for the property values.
*
* @example
* ```js
* const listHandle = await page.evaluateHandle(() => document.body.children);
* const properties = await listHandle.getProperties();
* const children = [];
* for (const property of properties.values()) {
* const element = property.asElement();
* if (element)
* children.push(element);
* }
* children; // holds elementHandles to all children of document.body
* ```
*/
async getProperties() {
const response = await this._client.send('Runtime.getProperties', {
objectId: this._remoteObject.objectId,
ownProperties: true,
});
const result = new Map();
for (const property of response.result) {
if (!property.enumerable)
continue;
result.set(property.name, createJSHandle(this._context, property.value));
}
return result;
}
/**
* Returns a JSON representation of the object.
*
* @remarks
*
* The JSON is generated by running {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify | JSON.stringify}
* on the object in page and consequent {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse | JSON.parse} in puppeteer.
* **NOTE** The method throws if the referenced object is not stringifiable.
*/
async jsonValue() {
if (this._remoteObject.objectId) {
const response = await this._client.send('Runtime.callFunctionOn', {
functionDeclaration: 'function() { return this; }',
objectId: this._remoteObject.objectId,
returnByValue: true,
awaitPromise: true,
});
return helper_js_1.helper.valueFromRemoteObject(response.result);
}
return helper_js_1.helper.valueFromRemoteObject(this._remoteObject);
}
/**
* Returns either `null` or the object handle itself, if the object handle is
* an instance of {@link ElementHandle}.
*/
asElement() {
// This always returns null, but subclasses can override this and return an
// ElementHandle.
return null;
}
/**
* Stops referencing the element handle, and resolves when the object handle is
* successfully disposed of.
*/
async dispose() {
if (this._disposed)
return;
this._disposed = true;
await helper_js_1.helper.releaseObject(this._client, this._remoteObject);
}
/**
* Returns a string representation of the JSHandle.
*
* @remarks Useful during debugging.
*/
toString() {
if (this._remoteObject.objectId) {
const type = this._remoteObject.subtype || this._remoteObject.type;
return 'JSHandle@' + type;
}
return 'JSHandle:' + helper_js_1.helper.valueFromRemoteObject(this._remoteObject);
}
}
exports.JSHandle = JSHandle;
/**
* ElementHandle represents an in-page DOM element.
*
* @remarks
*
* ElementHandles can be created with the {@link Page.$} method.
*
* ```js
* const puppeteer = require('puppeteer');
*
* (async () => {
* const browser = await puppeteer.launch();
* const page = await browser.newPage();
* await page.goto('https://example.com');
* const hrefElement = await page.$('a');
* await hrefElement.click();
* // ...
* })();
* ```
*
* ElementHandle prevents the DOM element from being garbage-collected unless the
* handle is {@link JSHandle.dispose | disposed}. ElementHandles are auto-disposed
* when their origin frame gets navigated.
*
* ElementHandle instances can be used as arguments in {@link Page.$eval} and
* {@link Page.evaluate} methods.
*
* If you're using TypeScript, ElementHandle takes a generic argument that
* denotes the type of element the handle is holding within. For example, if you
* have a handle to a `<select>` element, you can type it as
* `ElementHandle<HTMLSelectElement>` and you get some nicer type checks.
*
* @public
*/
class ElementHandle extends JSHandle {
/**
* @internal
*/
constructor(context, client, remoteObject, page, frameManager) {
super(context, client, remoteObject);
this._client = client;
this._remoteObject = remoteObject;
this._page = page;
this._frameManager = frameManager;
}
asElement() {
return this;
}
/**
* Resolves to the content frame for element handles referencing
* iframe nodes, or null otherwise
*/
async contentFrame() {
const nodeInfo = await this._client.send('DOM.describeNode', {
objectId: this._remoteObject.objectId,
});
if (typeof nodeInfo.node.frameId !== 'string')
return null;
return this._frameManager.frame(nodeInfo.node.frameId);
}
async _scrollIntoViewIfNeeded() {
const error = await this.evaluate(async (element, pageJavascriptEnabled) => {
if (!element.isConnected)
return 'Node is detached from document';
if (element.nodeType !== Node.ELEMENT_NODE)
return 'Node is not of type HTMLElement';
// force-scroll if page's javascript is disabled.
if (!pageJavascriptEnabled) {
element.scrollIntoView({
block: 'center',
inline: 'center',
// @ts-expect-error Chrome still supports behavior: instant but
// it's not in the spec so TS shouts We don't want to make this
// breaking change in Puppeteer yet so we'll ignore the line.
behavior: 'instant',
});
return false;
}
const visibleRatio = await new Promise((resolve) => {
const observer = new IntersectionObserver((entries) => {
resolve(entries[0].intersectionRatio);
observer.disconnect();
});
observer.observe(element);
});
if (visibleRatio !== 1.0) {
element.scrollIntoView({
block: 'center',
inline: 'center',
// @ts-expect-error Chrome still supports behavior: instant but
// it's not in the spec so TS shouts We don't want to make this
// breaking change in Puppeteer yet so we'll ignore the line.
behavior: 'instant',
});
}
return false;
}, this._page.isJavaScriptEnabled());
if (error)
throw new Error(error);
}
async _clickablePoint() {
const [result, layoutMetrics] = await Promise.all([
this._client
.send('DOM.getContentQuads', {
objectId: this._remoteObject.objectId,
})
.catch(helper_js_1.debugError),
this._client.send('Page.getLayoutMetrics'),
]);
if (!result || !result.quads.length)
throw new Error('Node is either not visible or not an HTMLElement');
// Filter out quads that have too small area to click into.
const { clientWidth, clientHeight } = layoutMetrics.layoutViewport;
const quads = result.quads
.map((quad) => this._fromProtocolQuad(quad))
.map((quad) => this._intersectQuadWithViewport(quad, clientWidth, clientHeight))
.filter((quad) => computeQuadArea(quad) > 1);
if (!quads.length)
throw new Error('Node is either not visible or not an HTMLElement');
// Return the middle point of the first quad.
const quad = quads[0];
let x = 0;
let y = 0;
for (const point of quad) {
x += point.x;
y += point.y;
}
return {
x: x / 4,
y: y / 4,
};
}
_getBoxModel() {
const params = {
objectId: this._remoteObject.objectId,
};
return this._client
.send('DOM.getBoxModel', params)
.catch((error) => helper_js_1.debugError(error));
}
_fromProtocolQuad(quad) {
return [
{ x: quad[0], y: quad[1] },
{ x: quad[2], y: quad[3] },
{ x: quad[4], y: quad[5] },
{ x: quad[6], y: quad[7] },
];
}
_intersectQuadWithViewport(quad, width, height) {
return quad.map((point) => ({
x: Math.min(Math.max(point.x, 0), width),
y: Math.min(Math.max(point.y, 0), height),
}));
}
/**
* This method scrolls element into view if needed, and then
* uses {@link Page.mouse} to hover over the center of the element.
* If the element is detached from DOM, the method throws an error.
*/
async hover() {
await this._scrollIntoViewIfNeeded();
const { x, y } = await this._clickablePoint();
await this._page.mouse.move(x, y);
}
/**
* This method scrolls element into view if needed, and then
* uses {@link Page.mouse} to click in the center of the element.
* If the element is detached from DOM, the method throws an error.
*/
async click(options = {}) {
await this._scrollIntoViewIfNeeded();
const { x, y } = await this._clickablePoint();
await this._page.mouse.click(x, y, options);
}
/**
* Triggers a `change` and `input` event once all the provided options have been
* selected. If there's no `<select>` element matching `selector`, the method
* throws an error.
*
* @example
* ```js
* handle.select('blue'); // single selection
* handle.select('red', 'green', 'blue'); // multiple selections
* ```
* @param values - Values of options to select. If the `<select>` has the
* `multiple` attribute, all values are considered, otherwise only the first
* one is taken into account.
*/
async select(...values) {
for (const value of values)
assert_js_1.assert(helper_js_1.helper.isString(value), 'Values must be strings. Found value "' +
value +
'" of type "' +
typeof value +
'"');
return this.evaluate((element, values) => {
if (element.nodeName.toLowerCase() !== 'select')
throw new Error('Element is not a <select> element.');
const options = Array.from(element.options);
element.value = undefined;
for (const option of options) {
option.selected = values.includes(option.value);
if (option.selected && !element.multiple)
break;
}
element.dispatchEvent(new Event('input', { bubbles: true }));
element.dispatchEvent(new Event('change', { bubbles: true }));
return options
.filter((option) => option.selected)
.map((option) => option.value);
}, values);
}
/**
* This method expects `elementHandle` to point to an
* {@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input | input element}.
* @param filePaths - Sets the value of the file input to these paths.
* If some of the `filePaths` are relative paths, then they are resolved
* relative to the {@link https://nodejs.org/api/process.html#process_process_cwd | current working directory}
*/
async uploadFile(...filePaths) {
const isMultiple = await this.evaluate((element) => element.multiple);
assert_js_1.assert(filePaths.length <= 1 || isMultiple, 'Multiple file uploads only work with <input type=file multiple>');
if (!environment_js_1.isNode) {
throw new Error(`JSHandle#uploadFile can only be used in Node environments.`);
}
// This import is only needed for `uploadFile`, so keep it scoped here to avoid paying
// the cost unnecessarily.
const path = await Promise.resolve().then(() => __importStar(require('path')));
const fs = await helper_js_1.helper.importFSModule();
// Locate all files and confirm that they exist.
const files = await Promise.all(filePaths.map(async (filePath) => {
const resolvedPath = path.resolve(filePath);
try {
await fs.promises.access(resolvedPath, fs.constants.R_OK);
}
catch (error) {
if (error.code === 'ENOENT')
throw new Error(`${filePath} does not exist or is not readable`);
}
return resolvedPath;
}));
const { objectId } = this._remoteObject;
const { node } = await this._client.send('DOM.describeNode', { objectId });
const { backendNodeId } = node;
// The zero-length array is a special case, it seems that DOM.setFileInputFiles does
// not actually update the files in that case, so the solution is to eval the element
// value to a new FileList directly.
if (files.length === 0) {
await this.evaluate((element) => {
element.files = new DataTransfer().files;
// Dispatch events for this case because it should behave akin to a user action.
element.dispatchEvent(new Event('input', { bubbles: true }));
element.dispatchEvent(new Event('change', { bubbles: true }));
});
}
else {
await this._client.send('DOM.setFileInputFiles', {
objectId,
files,
backendNodeId,
});
}
}
/**
* This method scrolls element into view if needed, and then uses
* {@link Touchscreen.tap} to tap in the center of the element.
* If the element is detached from DOM, the method throws an error.
*/
async tap() {
await this._scrollIntoViewIfNeeded();
const { x, y } = await this._clickablePoint();
await this._page.touchscreen.tap(x, y);
}
/**
* Calls {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus | focus} on the element.
*/
async focus() {
await this.evaluate((element) => element.focus());
}
/**
* Focuses the element, and then sends a `keydown`, `keypress`/`input`, and
* `keyup` event for each character in the text.
*
* To press a special key, like `Control` or `ArrowDown`,
* use {@link ElementHandle.press}.
*
* @example
* ```js
* await elementHandle.type('Hello'); // Types instantly
* await elementHandle.type('World', {delay: 100}); // Types slower, like a user
* ```
*
* @example
* An example of typing into a text field and then submitting the form:
*
* ```js
* const elementHandle = await page.$('input');
* await elementHandle.type('some text');
* await elementHandle.press('Enter');
* ```
*/
async type(text, options) {
await this.focus();
await this._page.keyboard.type(text, options);
}
/**
* Focuses the element, and then uses {@link Keyboard.down} and {@link Keyboard.up}.
*
* @remarks
* If `key` is a single character and no modifier keys besides `Shift`
* are being held down, a `keypress`/`input` event will also be generated.
* The `text` option can be specified to force an input event to be generated.
*
* **NOTE** Modifier keys DO affect `elementHandle.press`. Holding down `Shift`
* will type the text in upper case.
*
* @param key - Name of key to press, such as `ArrowLeft`.
* See {@link KeyInput} for a list of all key names.
*/
async press(key, options) {
await this.focus();
await this._page.keyboard.press(key, options);
}
/**
* This method returns the bounding box of the element (relative to the main frame),
* or `null` if the element is not visible.
*/
async boundingBox() {
const result = await this._getBoxModel();
if (!result)
return null;
const quad = result.model.border;
const x = Math.min(quad[0], quad[2], quad[4], quad[6]);
const y = Math.min(quad[1], quad[3], quad[5], quad[7]);
const width = Math.max(quad[0], quad[2], quad[4], quad[6]) - x;
const height = Math.max(quad[1], quad[3], quad[5], quad[7]) - y;
return { x, y, width, height };
}
/**
* This method returns boxes of the element, or `null` if the element is not visible.
*
* @remarks
*
* Boxes are represented as an array of points;
* Each Point is an object `{x, y}`. Box points are sorted clock-wise.
*/
async boxModel() {
const result = await this._getBoxModel();
if (!result)
return null;
const { content, padding, border, margin, width, height } = result.model;
return {
content: this._fromProtocolQuad(content),
padding: this._fromProtocolQuad(padding),
border: this._fromProtocolQuad(border),
margin: this._fromProtocolQuad(margin),
width,
height,
};
}
/**
* This method scrolls element into view if needed, and then uses
* {@link Page.screenshot} to take a screenshot of the element.
* If the element is detached from DOM, the method throws an error.
*/
async screenshot(options = {}) {
let needsViewportReset = false;
let boundingBox = await this.boundingBox();
assert_js_1.assert(boundingBox, 'Node is either not visible or not an HTMLElement');
const viewport = this._page.viewport();
if (viewport &&
(boundingBox.width > viewport.width ||
boundingBox.height > viewport.height)) {
const newViewport = {
width: Math.max(viewport.width, Math.ceil(boundingBox.width)),
height: Math.max(viewport.height, Math.ceil(boundingBox.height)),
};
await this._page.setViewport(Object.assign({}, viewport, newViewport));
needsViewportReset = true;
}
await this._scrollIntoViewIfNeeded();
boundingBox = await this.boundingBox();
assert_js_1.assert(boundingBox, 'Node is either not visible or not an HTMLElement');
assert_js_1.assert(boundingBox.width !== 0, 'Node has 0 width.');
assert_js_1.assert(boundingBox.height !== 0, 'Node has 0 height.');
const { layoutViewport: { pageX, pageY }, } = await this._client.send('Page.getLayoutMetrics');
const clip = Object.assign({}, boundingBox);
clip.x += pageX;
clip.y += pageY;
const imageData = await this._page.screenshot(Object.assign({}, {
clip,
}, options));
if (needsViewportReset)
await this._page.setViewport(viewport);
return imageData;
}
/**
* Runs `element.querySelector` within the page. If no element matches the selector,
* the return value resolves to `null`.
*/
async $(selector) {
const { updatedSelector, queryHandler } = QueryHandler_js_1.getQueryHandlerAndSelector(selector);
return queryHandler.queryOne(this, updatedSelector);
}
/**
* Runs `element.querySelectorAll` within the page. If no elements match the selector,
* the return value resolves to `[]`.
*/
async $$(selector) {
const { updatedSelector, queryHandler } = QueryHandler_js_1.getQueryHandlerAndSelector(selector);
return queryHandler.queryAll(this, updatedSelector);
}
/**
* This method runs `document.querySelector` within the element and passes it as
* the first argument to `pageFunction`. If there's no element matching `selector`,
* the method throws an error.
*
* If `pageFunction` returns a Promise, then `frame.$eval` would wait for the promise
* to resolve and return its value.
*
* @example
* ```js
* const tweetHandle = await page.$('.tweet');
* expect(await tweetHandle.$eval('.like', node => node.innerText)).toBe('100');
* expect(await tweetHandle.$eval('.retweets', node => node.innerText)).toBe('10');
* ```
*/
async $eval(selector, pageFunction, ...args) {
const elementHandle = await this.$(selector);
if (!elementHandle)
throw new Error(`Error: failed to find element matching selector "${selector}"`);
const result = await elementHandle.evaluate(pageFunction, ...args);
await elementHandle.dispose();
/**
* This `as` is a little unfortunate but helps TS understand the behavior of
* `elementHandle.evaluate`. If evaluate returns an element it will return an
* ElementHandle instance, rather than the plain object. All the
* WrapElementHandle type does is wrap ReturnType into
* ElementHandle<ReturnType> if it is an ElementHandle, or leave it alone as
* ReturnType if it isn't.
*/
return result;
}
/**
* This method runs `document.querySelectorAll` within the element and passes it as
* the first argument to `pageFunction`. If there's no element matching `selector`,
* the method throws an error.
*
* If `pageFunction` returns a Promise, then `frame.$$eval` would wait for the
* promise to resolve and return its value.
*
* @example
* ```html
* <div class="feed">
* <div class="tweet">Hello!</div>
* <div class="tweet">Hi!</div>
* </div>
* ```
*
* @example
* ```js
* const feedHandle = await page.$('.feed');
* expect(await feedHandle.$$eval('.tweet', nodes => nodes.map(n => n.innerText)))
* .toEqual(['Hello!', 'Hi!']);
* ```
*/
async $$eval(selector, pageFunction, ...args) {
const { updatedSelector, queryHandler } = QueryHandler_js_1.getQueryHandlerAndSelector(selector);
const arrayHandle = await queryHandler.queryAllArray(this, updatedSelector);
const result = await arrayHandle.evaluate(pageFunction, ...args);
await arrayHandle.dispose();
/* This `as` exists for the same reason as the `as` in $eval above.
* See the comment there for a full explanation.
*/
return result;
}
/**
* The method evaluates the XPath expression relative to the elementHandle.
* If there are no such elements, the method will resolve to an empty array.
* @param expression - Expression to {@link https://developer.mozilla.org/en-US/docs/Web/API/Document/evaluate | evaluate}
*/
async $x(expression) {
const arrayHandle = await this.evaluateHandle((element, expression) => {
const document = element.ownerDocument || element;
const iterator = document.evaluate(expression, element, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE);
const array = [];
let item;
while ((item = iterator.iterateNext()))
array.push(item);
return array;
}, expression);
const properties = await arrayHandle.getProperties();
await arrayHandle.dispose();
const result = [];
for (const property of properties.values()) {
const elementHandle = property.asElement();
if (elementHandle)
result.push(elementHandle);
}
return result;
}
/**
* Resolves to true if the element is visible in the current viewport.
*/
async isIntersectingViewport() {
return await this.evaluate(async (element) => {
const visibleRatio = await new Promise((resolve) => {
const observer = new IntersectionObserver((entries) => {
resolve(entries[0].intersectionRatio);
observer.disconnect();
});
observer.observe(element);
});
return visibleRatio > 0;
});
}
}
exports.ElementHandle = ElementHandle;
function computeQuadArea(quad) {
// Compute sum of all directed areas of adjacent triangles
// https://en.wikipedia.org/wiki/Polygon#Simple_polygons
let area = 0;
for (let i = 0; i < quad.length; ++i) {
const p1 = quad[i];
const p2 = quad[(i + 1) % quad.length];
area += (p1.x * p2.y - p2.x * p1.y) / 2;
}
return Math.abs(area);
}