VSCode 自定义用户代码片段

很多时候时候我们在写代码的时候会遇到很多重复的带吗，并且这些代码的格式是固定的，这时候我们就可以把这些固定的代码片段做成快捷键，在需要用到的地方打出关键字就可以引用出模板。以下是自己工作中常用的一些代码片段，以及设置用户代码片段的方式。
1.首先我们需要找设置用户代码片段的文件如下图所示

我们常用的就是html和js的快捷键设置

下面的代码片段是js中常用的一些代码结构，复制粘贴到对应的javascript.json文件中即可

{
	// Place your snippets for JavaScript here. Each snippet is defined under a snippet name and has a prefix, body and 
	// description. The prefix is what is used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. Placeholders with the 
	// same ids are connected.
	// Example:
	"Print to console": {
		"prefix": "log",
		"body": [
			"console.log('$1');",
		],
		"description": "Log output to console"
	},
	"zhe shi ajax kuai jie jian": {
		"prefix": "get",
		"body": [
			"//(1)创建小黄人对象",
			"var xhr = new XMLHttpRequest();",
			"//(2)设置请求方法与地址",
			"xhr.open('get','https://autumnfish.cn/api/hero/simple?name=凯特琳')",
			"//(3)发送请求",
			"xhr.send();",
			"//(4)注册响应回调",
			"xhr.onload = function(){",
			"\tconsole.log(xhr.responseText);",
			"};",
		],
		"description": "这是ajax快捷键"
	},
	"yulan tupian": {
		"prefix": "ajax_yulan",
		"body": [
			"//1.给file表单元素注册onchange事件",
			"$('file表单').change(function () {",
			"\t//1.2 获取用户选择的图片",
			"\tvar file = this.files[0];",
			"\t//1.3 将文件转为src路径",
			"\tvar url = URL.createObjectURL(file);",
			"\t//1.4 将url路径赋值给img标签的src",
			"\t$('img元素').attr('src', url);",
			"});"
		],
		"description": "图片预览固定四个步骤"
	},
	"comment for function": {
		"prefix": "///",
		"body": [
			"/**",
			"* @description:",
			"* @param {type} ",
			"* @return: ",
			"*/",
		],
		"description": "函数标准注释快捷键"
	},
	"jquery to ajax": {
		"prefix": "ajax",
		"body": [
			"$.ajax({",
			"\turl:'',",
			"\ttype:'get',",
			"\tdataType:'json',",
			"\tdata:'',",
			"\tsuccess: function(backData){",
			"",
			"\t}",
			"});"
		],
		"description": "ajax请求"
	},
	"get for XMLHTTPRequest": {
		"prefix": "ajax1",
		"body": [
			"//(1).实例化ajax对象",
			"var xhr = new XMLHttpRequest();",
			"//(2).设置请求方法和地址",
			"//get请求的数据直接添加在url的后面 格式是 url?key=value",
			"xhr.open('get', '接口url');",
			"//(3).发送请求",
			"xhr.send();",
			"//(4).注册回调函数",
			"xhr.onload = function() {",
			"\tconsole.log(xhr.responseText)",
			"};",
		],
		"description": "get-原生XMLHTTPRequest实现ajax"
	},
	"post for XMLHTTPRequest": {
		"prefix": "ajax2",
		"body": [
			"//(1).实例化ajax对象",
			"var xhr = new XMLHttpRequest();",
			"//(2).设置请求方法和地址",
			"xhr.open('post', '接口url');",
			"//(3).设置请求头（post请求才需要设置）",
			"xhr.setRequestHeader('Content-type','application/x-www-form-urlencoded');",
			"//(4).发送请求 ： 参数格式  'key=value' ",
			"xhr.send('key=value');",
			"//(5).注册回调函数",
			"xhr.onload = function () {",
			"\tconsole.log(xhr.responseText);",
			"};"
		],
		"description": "post-原生XMLHTTPRequest实现ajax"
	},
	"file to ajax": {
		"prefix": "ajax-file",
		"body": [
			"$('提交按钮').on('click',function(e){",
			"\t//禁用表单默认提交事件",
			"\te.preventDefault();",
			"\t//创建FormData对象：参数是表单dom对象",
			"\tvar fd = new FormData('form表单DOM对象')",
			"\t$.ajax({",
			"\t\turl:'',",
			"\t\ttype:'post',",
			"\t\tdataType:'json',",
			"\t\tdata:fd,",
			"\t\tcontentType: false,",
			"\t\tprocessData: false,",
			"\t\tsuccess: function(backData){",
			"\t\t}",
			"\t});",
			"});"
		],
		"description": "表单提交ajax请求"
	},
	"express-server": {
		"prefix": "express",
		"body": [
			"//1.导入模块",
			"const express = require('express');",
			"//2.创建服务器",
			"let app = express();",
			"//3.开启服务器",
			"app.listen(3000,()=>{",
			"console.log('success');",
			"});"
		],
		"description": "快速搭建express服务器"
	},
	"get element by id": {
		"prefix": "gid",
		"body": [
			"var box = document.getElementById('box')",
		],
		"description": "根据id获取元素"
	},
	"enmu arr": {
		"prefix": "forin",
		"body": [
			"for(var i = 0;i{",
				"\t//成功回调",
				"\tconsole.log(res)",
			"});",
		],
		"description": "axios请求"
	},
}

以上就是个人的一些常用快捷键设置（仅供参考），如有不合理的地方欢迎留言告知，谢谢。