1.svg使用

参考链接

2.vue 修改网页标题

1.在public下的index.html里修改title  <title>xx系统</title>
2.document.title = "xx系统"

3.下载图片

window.location="图片网络地址"

4.秒转化为 小时分钟秒

 secondsFormat(value) {var theTime = parseInt(value); // 秒var theTime1 = 0; // 分var theTime2 = 0; // 小时var theTime3 = 0; // 天if (theTime > 60) {theTime1 = parseInt(theTime / 60);theTime = parseInt(theTime % 60);if (theTime1 > 60) {theTime2 = parseInt(theTime1 / 60);theTime1 = parseInt(theTime1 % 60);}}var result = "" + parseInt(theTime);if (theTime1 > 0) {result = "" + parseInt(theTime1) + "分" + result;}if (theTime2 > 0) {result = "" + parseInt(theTime2) + "小时" + result;}return result;},

5.秒转化为 天小时分钟秒

  formatSecond(value) {const days = Math.floor(value / 86400);const hours = Math.floor((value % 86400) / 3600);const minutes = Math.floor(((value % 86400) % 3600) / 60);const seconds = Math.floor(((value % 86400) % 3600) % 60);var forMatDate = "";if (days) {forMatDate += days + "天";}if (hours) {forMatDate += hours + "小时";}if (minutes) {forMatDate += minutes + "分钟";}forMatDate += seconds;return forMatDate;},

7.把时间中的-、/转化

replace(/-/g, "/")
e[0].replace(/\//g, "-");

8.把一位数的时分秒自动填充为两位数

let month='9'
month=("00" + month).substr(-2, 2)

9.javascript 从对象数组中 按字段/属性取最大值或最小值

var array=[{value: 100},{value: 20},{value: 50}];取最大值：Math.max.apply(Math, array.map((item)=> {return item.value}))
取最小值：Math.min.apply(Math, array.map((item)=> {return item.value}))

10.js在当前时间上加分钟数，得出结果

1.获取当前日期
var date=new Date();
2. 获取当前分钟
var minutes=date.getMinutes();
3. 设置当前时间10分钟前：把当前分钟数+10后的值重新设置为date对象的分钟数
date.setMinutes(minutes+10);
4. 测试
console.log(date.toLocaleString());

11.修改对象key

对象修改建名

12.自定义组件上用v-model传递参数

父组件用 v-model
组件接收用model: {prop: 'checked',event: 'input'},
props: {checked: {default: ''},}
通知父组件 this.$emit('change', result)model: {prop: 'checked',event: 'input'},
props: {checked: {default: ''},}
通知父组件 this.$emit('input', result)

js挂载vue组件并传参

用js挂载.vue组件/动态创建实例，参考链接
挂载的vue怎么传prop 参考链接

父组件let temp="传递的参数"let c = document.createElement("div");c.id = "echart-layout";let Constructor = Vue.extend(weather);let toast = new Constructor({ propsData: { viewData: temp } });toast.$mount();c.appendChild(toast.$el);子组件 weatherprops: {viewData: {type: String,default: "",},},