JavaScript

One, JavaScript automatic loading① in text with onload: When all the contents of the page (including pictures) are loaded, then the onload is executed as follows:1 2 ② in script window.onload: When all the contents of the page (

Basic Memory ConceptsLife cycle of Memory:1. Allocate the required memory2. Memory reading and writing3, when not needed to release itThe memory life cycle of all languages is basically consistent, except that the final step is clear in low-level

ObjectiveRecently someone asked me how to copy an object, because he met a demand, need to take the back end of the data, save a copy, the original data will change because of interaction, the final need to compare the similarities and differences

JavaScript Print ControlsGitHub AddressHttps://github.com/DoersGuild/jQuery.printNeed to introduce jquery before use$ ("#mapDiv"). Print ({ globalstyles:true,//) contains the style of the parent document, and the default is True

Prototype as JS relatively difficult to understand a point of knowledge, here to publish their own understanding.This article will contain the following sections:1, JS prototype simple introduction,2, JS construction function Introduction,3,

Web communication, a particularly large topic, involves a wide range of facets. I've recently learned some of the web communication in JavaScript, and here's a summary. The text should have the understanding error or the expression is not clear

Str= ' I am a string of strings 'CharAt ()//Get a whole string of strings one of which is a substringValue range: 0~ string Length-1Alert (Str.charat ())//I do not write anything in parentheses when the default is No. 0Alert (Str.charat

The prototype chain inherits function Parent () {this.name = ' per ';} function Child () {this.age = 20;} Child.prototype = new Parent (), var child = new Child (), Console.log (Child.name + "" + child.age)//per 20The constructor inherits function

What is encapsulation?My understanding is to put a function alone into a component, like making dumplings, before making dumplings have to make dumplings with flour, and then make dumplings, and then handmade dumplings, but now people invented the

The concept of JS inheritanceJS commonly used in the following two ways to inherit: Prototype chain inheritance (inheritance between objects) class inheritance (inheritance between constructors) Since JS is not really an

First, you need to have a button to impersonate the login: Login And then, we want to do this by clicking on this button:From the picture above, we can see that the gray background is the mask layer, and the light blue area is where the landing box

Summarize the HTML tags learned over the past few days. 1. Basic Knowledge: W3S, operations on MOOC or FCC   2. The tag must be closed. Tags are usually paired, for example, xxxx . Tags are also empty content tags, such as: Tag attributes

Solve the overlapping problem of text-decoration: underline,I. text-decoration: underline CSStext-decoration:underlineYou can add underscores (_) to inline text. However, if you have high requirements on details, you will find that the underscores (_

Common tags and type conversion, common tag type conversion Common labels: Tag semantics: what is the meaning of a tag and what can be done. Weight, the priority of the object. : the title of the webpage with the maximum weight. Div label, no

Input type = range Style Optimization, inputrange First, the HTML code: 　　 1 Css code: 　　 1 input [type = "range"] {2/*-webkit-box-shadow: 0 1px 0 0px #424242, 0 1px 0 #060607 inset, 0px 2px 10px 0px black inset, 1px 0px 2px rgba (0, 0, 0, 0.4)

Css is automatically hidden when the number of specified rows is exceeded, and the number of css rows is exceeded.Single RowOverflow: hidden;Text-overflow: ellipsis;White-space: nowrap; Multi-line (compatible with various browsers) // overwrite the

Typographical experience, 1. Fill the image with a fixed width and height div without deformation: Css:. Div {width: 100px; height: 100px;}. div1 img {width: 100%; height: 100%; object-fit: cover; // controls the image style without deformation} 2.

Vue2 navigation modifies the instance of the navigation content based on the route value, vue2 instance In projects, our navigation is generally the same as long, but the content will change according to the content of the previous page. We only

Based on the differences between style. width and offsetWidth in js (detailed description ), As a beginner, I often wonder whether style. width or offsetWidth is used to obtain the width (height, top value...) of an element. 1. When a style is

In addition to the specified area, jQuery hides the DIV function by clicking anywhere. jquerydiv The Code is as follows: $ ('Body'). click (function (e) {var target = inline (e.tar get); // If # overlay or # btn contains child elements, you can use