mirror of
https://github.com/ascribe/onion.git
synced 2024-12-23 01:39:36 +01:00
58 lines
1.3 KiB
JavaScript
58 lines
1.3 KiB
JavaScript
let mapAttr = {
|
|
link: 'href',
|
|
source: 'src'
|
|
}
|
|
|
|
let mapExt = {
|
|
js: 'source',
|
|
css: 'link'
|
|
}
|
|
|
|
|
|
let InjectInHeadMixin = {
|
|
/**
|
|
* Provide functions to inject `<script>` and `<link>` in `<head>`.
|
|
* Useful when you have to load a huge external library and
|
|
* you don't want to embed everything inside the build file.
|
|
*/
|
|
|
|
isPresent(tag, src) {
|
|
let attr = mapAttr[tag];
|
|
let query = `head > ${tag}[${attr}="${src}"]`;
|
|
return document.querySelector(query);
|
|
},
|
|
|
|
injectTag(tag, src){
|
|
console.log(this.foobar);
|
|
if (InjectInHeadMixin.isPresent(tag, src))
|
|
return;
|
|
|
|
let attr = mapAttr[tag];
|
|
let element = document.createElement(tag);
|
|
document.head.appendChild(element);
|
|
element[attr] = src;
|
|
},
|
|
|
|
injectStylesheet(src) {
|
|
this.injectTag('link', src);
|
|
},
|
|
|
|
injectScript(src) {
|
|
this.injectTag('source', src);
|
|
},
|
|
|
|
inject(src) {
|
|
//debugger;
|
|
let ext = src.split('.').pop();
|
|
try {
|
|
let tag = mapAttr(src);
|
|
} catch (e) {
|
|
throw new Error(`Cannot inject ${src} in the DOM, cannot guess the tag name from extension ${ext}. Valid extensions are "js" and "css".`);
|
|
}
|
|
InjectInHeadMixin.injectTag(tag, src);
|
|
}
|
|
|
|
};
|
|
|
|
export default InjectInHeadMixin;
|