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@just4/load-script

v1.2.0

Published

Just for script loading in browser.

Downloads

16

Readme

@just4/load-script

提供动态加载脚本的相关接口。

安装

npm i @just4/load-script

调用

安装完毕之后,就可以引入并调用相关的方法:

import {
  loadScript,
  jsonp
} from '@just4/load-script';

动态加载脚本文件

加载外部脚本文件,并获取其写入的全局对象:

import { loadScript } from '@just4/load-script';
await loadScript('https://code.jquery.com/jquery-1.12.4.min.js');
const $ = window.jQuery;

JSONP 请求

JSONP 本质上是通过动态加载脚本文件的方式来加载数据,调用示例如下:

import { jsonp } from '@just4/load-script';
const res = await jsonp('a jsonp url', {
  data: { id: 1 },
  timeout: 5 * 1000,
  preventCaching: true
});

备用请求

无论是加载脚本还是 jsonp,都支持通过 backupURL 指定请求的备用地址。指定了备用地址时,如果原 URL 加载失败,就会加载备用 URL。

import { loadScript } from '@just4/load-script';
await loadScript('https://code.jquery.com/jquery-1.12.4.min.js', {
  backupURL: 'https://ajax.aspnetcdn.com/ajax/jquery/jquery-1.12.4.min.js'
});
const $ = window.jQuery;

注意事项

  • 慎用 preventCaching 选项。设为 true 时,会给请求的 url 加上时间戳参数,这可能会导致后端服务缓存穿透。
  • 调用 jsonp 方法时,该方法会按照特定规则生成回调函数名,并确保该名字对应的全局变量没有被占用。如果你希望指定回调函数名,可以使用 callbackName 选项进行控制,但是这种情况下请自行确保 callbackName 对应的全局变量没有被占用。

相关文档

Changelog

v1.2.0

  • 支持备用 URL 的加载。

v1.1.0

  • 升级依赖包版本并对应调整相关 API 的调用。