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1 Strict mode 1.1 What is a strict mode In addition to providing normal mode, JavaScript also provides strict mode.The strict pattern of ES5 is one way to adopt restrictive Javascript variants.That is, js code is run under strict conditions.Strict mode is only supported in browsers over IE10, and older browsers are ignored.Strict mode makes s ...

JavaScript: Concept: a client scripting language Running in the client browser. Every browser has a JavaScript parsing engine Script language: it can be parsed and executed by the browser without compilation Functions: It can enhance the interaction between users and html pages, control html el ...

By studying Ruan Yifeng's Getting started with ECMAScript 6 , some knowledge points that Promise can easily forget new Promise((resolve, reject) => { reject() resolve() console.log('hello') }).then(() => { console.log('resolve'); }, () => { console.log('reject'); }) for (let ...

Method Description The bind() method creates a new function that, when called, sets its this keyword to the value provided. Grammar Description fn.bind(thisArg,arg1,arg2,..) Parameter Description thisArg: When a bound function is called, this parameter points to this as the original function runs.This p ...

Introduction As a powerful static type checking tool, TypeScript is now visible in many large, medium-sized applications and popular JS libraries.As a weakly typed language, JS modifies the type of a variable without taking a moment to write code, resulting in unexpected runtime errors.However, TypeScript helps us solve this problem during comp ...

Promise is an object that represents the final completion or failure of an asynchronous operation.It has now become an important solution for asynchronous programming in JavaScript. Before you get even closer to it, there are a few basic concepts to understand. Alternatively, you can find the Here See the full source code. Synchronous and asyn ...

Finally learn JavaScript! Array related parameters Array shift deletes the first element, pop deletes the last element, and all returned elements are deleted. unshift adds an element at the beginning, push adds an element at the end, splice is used for deletion and modification, slice is used for slicing. *** Data type conversion The + operator ...

Preface The last time, I have learned [THE LAST TIME] has always been a series that I want to write, aiming to build up and review the front end. It is also to check and fill in the gaps and share the technology. Welcome to comment on Tucao. The series of articles are first published in the public account [full stack front-end selection], the ...

Medium soft Day10 JavaScript Foundation Web pages, websites and Applications Page: A separate page Website: Some columns of related pages are grouped together Application: It can interact with users and implement some functions. Introduction to JavaScript What is JavaScript JavaScript is a ...

The call() method calls a function using a specified this value and one or more parameters given separately. The apply() method calls a function with a given value of this and the parameters provided as an array (or similar array object). The bin ...