simple-load-script

simple-load-script

Very simple promise based script loader and JSONP

Usage

Async/await

import simpleLoadScript from 'simple-load-script';

try {
    const scriptRef = await simpleLoadScript(
        'https://code.jquery.com/jquery-3.7.1.min.js',
    );

    console.log(scriptRef); // HTMLScriptElement
} catch (err) {
    console.log(err);
}

Promise

import simpleLoadScript from 'simple-load-script';

simpleLoadScript('https://code.jquery.com/jquery-3.7.1.min.js')
    .then(function (scriptRef) {
        console.log(scriptRef); // HTMLScriptElement
    })
    .catch(function (err) {
        console.log(err);
    });

Config object

import simpleLoadScript from 'simple-load-script';

try {
    const scriptRef = await simpleLoadScript({
        url: 'https://code.jquery.com/jquery-3.7.1.min.js',
        inBody: true,
        attrs: { id: 'one', charset: 'UTF-8' },
    });

    console.log(scriptRef); // HTMLScriptElement inBody with attrs present
} catch (err) {
    console.log(err);
}

Google Maps API

Runs global callback (window.gmapiready)

import simpleLoadScript from 'simple-load-script';

try {
    const scriptRef = await simpleLoadScript(
        '//maps.googleapis.com/maps/api/js?&callback=gmapiready',
    );

    console.log(scriptRef); // HTMLScriptElement
} catch (err) {
    console.log(err);
}

JSONP

Runs global callback (window.elo)

var simpleLoadScript = require('simple-load-script');

try {
    const scriptRef = await simpleLoadScript({
        url: '//api.ipinfodb.com/v3/ip-city/?format=json&callback=elo',
        removeScript: true,
    });

    console.log(scriptRef); // undefined
} catch (err) {
    console.log(err);
}

Array mode - objects and urls, callBackNames must have unique names

import simpleLoadScript from 'simple-load-script';

try {
    const scriptRefs = await simpleLoadScript([
        '//maps.googleapis.com/maps/api/js?&callback=gmapiready',
        {
            url: '//api.ipinfodb.com/v3/ip-city/?format=json&callback=elo',
            removeScript: true,
        },
        'https://code.jquery.com/jquery-3.7.1.min.js',
    ]);

    console.log(scriptRefs); // HTMLScriptElement[]
} catch (err) {
    console.log(err);
}

Arguments

Config | string | (Config | string)[]

Config

Interface

interface Config {
    url: string;
    attrs?: Record<string, string>;
    inBody?: boolean;
    insertInto?: string | null;
    removeScript?: boolean;
}

Default values

const defaultConfig = {
    url: '',
    attrs: {},
    inBody: false,
    insertInto: null,
    removeScript: false,
};

• url - file to append to body
• attrs - with attributes to append to script tag (charset, type, id, …)
• inBody - append to document.body instead of document.head
• insertInto - CSS selector (an ID, class name, element name, etc.) to insert the script into. Overrides inBody value.
• removeScript - remove script tag after load; it's always removed on an error

Specific import

Check files or package.json

Changelog

View on github.

Misc.

• uses addEventListener, Array.isArray, for…of, destructuring Promise & Promise.all