JavaScript

14 Strokes to fix JavaScript debuggingTranslator by: many times, you may just rely on Console.log to debug JavaScript code, the limitations of this is self-evident, this blog will teach you a few practical debugging skills. Original: The

I. Event delegationWhat is an event delegate? In reality, there are 100 students who receive a courier at noon, but this100 students can not stand at the school gate at the same time, then will entrust the doorman to collect, and then handed over to

In the two articles of JavaScript modularization and Closure and javascript-module-pattern-in-depth, the basic idea of modularization is mentioned, but in the actual project, the Modularization and the division of the project personnel, the

Tag: false character spaces string to perform data type conversion undefined else ble BSPHave you ever seen a code like this: a=a| | ""; Maybe JavaScript beginners will be confused about this.In fact:a=a| | " DefaultValue ";And:if (! a) { a=

1. OverviewIn addition to the normal operating mode, ECMAscript 5 adds a second mode of operation: "Strict mode" (strict). As the name implies, this mode allows JavaScript to run under stricter conditions.2. Why use Strict mode-Eliminate some of the

1. What is a scopeAny programming language has the concept of scope, simply speaking, scope is the scope of the variable.2. Classification of variables and scope of variable scopesIn JavaScript, variables are divided into global variables and local

This article translates the JavaScript Tutorial playlist of up master Kudvenkat on YouTubeSOURCE Address here:https://www.youtube.com/watch?v=PMsVM7rjupU&list=PL6n9fhu94yhUA99nOsJkKXBqokT3MBK0bIn this video we will use examples to discuss the

The This keyword plays a crucial role in JavaScript, and every time it comes along with its point-of-reference, this is where many beginners are prone to error.However, this article will take you a one-time deal with this point of the problem, hope

The scope of a variableTo understand closures, you must first understand the special variable scope of JavaScript.The scope of a variable is nothing more than two kinds: global variables and local variables.The special point of the JavaScript

Recently, time is required to add and subtract operations, in the past need to take out specific time and then add and subtract, but also consider the rounding problem is very troublesome　　Reprint Please specify source:

Today I learned the For loop in JavaScript and the judgment statement for iffor (initial value; loop condition; action) {Code statements that meet the criteria to execute}Initial value: The initialization variable before the loop, usually an

Dry goods! Front-end development guide: 20 + Let's talk about it. Just get it done!      1. CSS media query and Range selector If you have read the article "mod queries" about A List Apart recently written by Patrick Clancey, you will understand

Highlights of vue errors and vue errors 1. vue error: less-loader css-loader style-loader Not Installed The possible cause is that less is not installed. 2. vuex error: Computed property "xxx" was assigned to but it has no setter When vuex is

VUE learning, minor problems encountered when setting up the vue runtime environment, vue Runtime Environment 1. Use vscode to edit the project. First, set up a vue running environment, open the integration terminal, and use npm install live-server-

In-depth understanding of line-height and vertical-align-common attributes of front-end layout, Line-height, font-size, and vertical-align are key attributes for setting the element layout in the row. These three attributes are mutually dependent,

Nuxt + axios solves the sample code for front-end and back-end SSR separation, nuxtaxios Background: Because back-end programmers generally do not have a good grasp of CSS and JS, the general development mode is that the UI provides static html to

Share the React Native time conversion format tool class, reactnative This article provides examples of the React Native time conversion format tool for your reference. The specific content is as follows: Class DateUtil {/*** For example:

Let's talk about the difference between brackets and no brackets for constructors. As follows: // First define a constructor Hellofunction Hello () {alert (1) ;}// define a function expression var getName = function () {alert (2 );} // instantiate

Css clear float, css float Float in css: Float: left floating Float: right float Float: none does not float Float: inherit inherits floating (inherits floating attributes of the parent element. If the parent element does not have floating attributes,

01. CSS animation --> transform,01.css -- transform   Transform: Translate (parameter 1, parameter 2); offset the element on the X axis and Y axis --> parameter 1: X; parameter 2: Y Rotate (parameter 1); let the element rotate; Unit (deg) Scale