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image-loader-progress

v1.1.0

Published

图片加载进度监控

Downloads

1

Readme

image-loader-progress

图片加载进度监控

今天在开发中发现背景图片很大,需要控制加载进度,如果是img可以很好的监听到,但是在css中我们该如何操作呢

首先是提取CSS背景图的地址,然后通过js监听加载进度

加载图片

这是监控图片加载是否完成的核心部分,最后返回一个promise

import {loadImage} from 'image-loader-progress'

loadImage('http://xxxxxx').then((url) => {}, (url) => {})

批量加载图片

根据传入进来的url加载,可以是一个数组,也可以是一个字符串,最后返回一个promise

import {loaderUrls} from 'image-loader-progress'

loaderUrls('http://xxxxxx')
  .then((urls) => {}, (urls) => {})

loaderUrls(['http://xxxxxx', 'http://yyyyyyyy'])
  .then((urls) => {}, (urls) => {})

提取图片地址

在css中的图片要使用特殊的方法提取,提取出来的地址是 url(http://xxxxx)所以要截取字符串

import {cssUrl} from 'image-loader-progress'

const url = cssUrl(document.querySelector('bg'))

批量提取图片地址并批量加载图片

在元素中批量提取图片地址,也可以是单个元素(仅支持div标签),并调用批量加载图片方法

import {eleLoaderImages} from 'image-loader-progress'

eleLoaderImages(document.querySelector('bg'))
  .then((urls) => {}, (urls) => {})

eleLoaderImages([document.querySelector('bg1'), document.querySelector('bg2')])
  .then((urls) => {}, (urls) => {})