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Request principle 1. The request object and the response object are created by the server. Let's use them. 2. The request object is used to get the request message, and the response object is used to set the response message. Request function Get request message data Get request line data Reques ...

Article directory 1.filters 2. Calculated calculation attribute 3. watch 4.template 5. Dynamic binding style : class = "object / array" : style = "object / array" 1.filters If there are two vue instances, one instance cannot get the method in the other instance. As follows ...

1 Function object Section 1: Function object introduction Function is the method object of js. You can use function instances to generate any js method object The second section: creating method objects with Function <script type="text/javascript"> /* function say(name,age){ alert(name+"T ...

Memento Memento Pattern holds a state of an object so that it can be restored at the appropriate time.The memo mode is behavioral. introduce Intention: Capture the internal state of an object without destroying its encapsulation and save the state outside the object. Main Solution: The so-called ...

Article Directory Bootstrap: Responsive Layout CSS Styles and JS Plugins case Bootstrap: 1. Concept: A framework for front-end development, Bootstrap, from Twitter, is currently a popular front-end framework.Bootstrap is based on HTML, CSS, JavaScript. It is simple and flexible, making Web deve ...

window.onload = function() { //Path to json file var url = "js/test.json" var request = new XMLHttpRequest(); //Set request method and path request.open("get", url); //Do not return data to the server request.send(null); request.onload = functio ...

How to create components // 1.1 use Vue.extend to create a global Vue component var com1 = Vue.extend({ // Through the template attribute, the HTML structure to be displayed by the component is specified template:'<h3>This is used. Vue.extend Components created ...

In the common user registration page, users need to select a picture locally as their avatar and preview it at the same time. There are two common ideas: first, upload the image to the temporary folder of the server, return the url of the image, and then render it on the html page; Another idea is to preview the image directl ...

Learning purpose: to use the framework of scratch to obtain dynamic website information. Take Taobao as an example, to obtain the [description, price, store, picture link] of goods and save the obtained information to execl table, or json file, database. Open Taobao homepage to search Yijia mobile phone, and get the url of t ...

Demand: Ensure that the printing method is executed after all pictures are loaded successfully Implementation of final code: printMail = () => { this.btnDisplay='none'; //Get the window object of iframe let iframe = document.getElementsByClassName('wea-email-content-iframe')[0].contentWindow; let img_lengt ...