vue常用全局filter

vue


  1. 保留小数位数

Vue.filter("toFixed", function (val, acc) { //保留小数位,acc为保留几位小数位

let num = parseFloat(val);

if (isNaN(num)) {

num = 0;

}

let accuracy = parseInt(acc);

if (isNaN(accuracy) || accuracy < 0 || accuracy > 10) {

accuracy = 2;

}

return num.toFixed(accuracy);

});

  1. 转百分比

Vue.filter("toPercent", function (val, acc) { //小数转百分比 ,acc为保留小数位

let num = parseFloat(val);

if (isNaN(num)) {

num = 0;

}

let accuracy = parseInt(acc);

if (isNaN(accuracy) || accuracy < 0 || accuracy > 10) {

accuracy = 2;

}

return (num * 100).toFixed(accuracy) + "%"

});

  1. 通用键值转换(数据源为数组)

import _ from 'underscore';

Vue.filter("keyToValueConverter", function (val, dataSource,keyname,valuename) {

if (val != null) {

val = val.toString().trim();

let matched = _.find(dataSource, function (obj) { return obj[keyname] == val; });

if (matched) {

return matched[valuename];

}

}

return "";

});

  1. 通用多键转多值(数据源为数组)

import _ from 'underscore';

Vue.filter("keysToValuesConverter", function (val, dataSource, keyname, valuename, keySeparator, valueSeparator) { //默认分隔符为逗号

let text = "";

if (!keySeparator || typeof (keySeparator) != 'string') {

keySeparator = ',';

}

if (!valueSeparator || typeof (valueSeparator) != 'string') {

valueSeparator = ',';

}

if (val != null) {

let valueArr = val.split(',');

let nameArr = _.map(valueArr, function (valueItem) {

let matched = _.find(dataSource, function (item) { return item[keyname] == valueItem; });

return matched ? matched[valuename] : null;

});

nameArr = _.filter(nameArr, (item) => { return item != null })

if (nameArr && nameArr.length > 0) {

text = nameArr.join(',');

}

}

return text;

});

  1. 日期格式化(用法同C# "yyyy-MM-dd HH:mm:ss")

Vue.filter("dateTimeFormat", function (date, fmt = 'yyyy-MM-dd HH:mm:ss') { //日期时间格式化

if (!date) {

return ''

}

if (typeof date === 'string') {

date = date.replace('T', ' ').replace('Z', '');

date = new Date(date.replace(/-/g, '/'))

}

if (typeof date === 'number') {

date = new Date(date)

}

var o = {

'M+': date.getMonth() + 1,

'd+': date.getDate(),

'h+': date.getHours() % 12 === 0 ? 12 : date.getHours() % 12,

'H+': date.getHours(),

'm+': date.getMinutes(),

's+': date.getSeconds(),

'q+': Math.floor((date.getMonth() + 3) / 3),

'S': date.getMilliseconds()

}

var week = {

'0': '\u65e5',

'1': '\u4e00',

'2': '\u4e8c',

'3': '\u4e09',

'4': '\u56db',

'5': '\u4e94',

'6': '\u516d'

}

if (/(y+)/.test(fmt)) {

fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length))

}

if (/(E+)/.test(fmt)) {

fmt = fmt.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? '\u661f\u671f' : '\u5468') : '') + week[date.getDay() + ''])

}

for (var k in o) {

if (new RegExp('(' + k + ')').test(fmt)) {

fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? (o[k]) : (('00' + o[k]).substr(('' + o[k]).length)))

}

}

return fmt

});

  1. 秒、毫秒(时长)格式化为时分秒(例:65000ms => 00:01:05)

    //秒、毫秒转时分秒显示  例:65000 => 00:01:05

//参数:isMs 是否是毫秒;dft:默认显示

Vue.filter('timeLongFormat', function (value, isMs=false,dft = '00:00:00') {

let total = parseInt(value);

if (!isNaN(total)) {

if (isMs) {

total = total/1000;

}

let hours = parseInt(total / 3600);

let minutes = parseInt((total % 3600) / 60);

let seconds = parseInt((total % 3600) % 60);

let h = hours > 9 ? hours : '0' + hours;

let m = minutes > 9 ? minutes : '0' + minutes;

let s = seconds > 9 ? seconds : '0' + seconds;

return h + ':' + m + ':' + s;

}

else {

return dft;

}

});

7.秒、毫秒(时长)格式化为时分秒(中文)(例:65000ms => 1分5秒)

Vue.filter("timeLongFormat_zh", function (valuevalue, isMs = false, dft = '--') {

let total = parseInt(value);

if (!isNaN(total)) {

if (isMs) {

total = total / 1000;

}

let hours = parseInt(total / 3600);

let minutes = parseInt((total % 3600) / 60);

let seconds = parseInt((total % 3600) % 60);

let h = hours == 0 ? "" : `${hours}时`;

let m = minutes == 0 ? "" : `${minutes}分`;

let s = seconds == 0 ? "" : `${seconds}秒`;

return h + m + s;

}

else {

return dft;

}

});

  1. byte转K、M、G

Vue.filter("bytesToSize", function (bytes) { //文件大小单位转换

if (bytes === 0) { return '0 B' };

var k = 1024;

var sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];

var i = Math.floor(Math.log(bytes) / Math.log(k));

return (bytes / Math.pow(k, i)).toPrecision(4) + ' ' + sizes[i];

});

  1. 数据源是对象的键值转换

    Vue.filter("objectKeyToValueConverter", function (val, keyValueObject) {

var isExists = _.has(keyValueObject, val);

if (isExists) {

return keyValueObject[val];

}

return "";

});

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