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polyfill.io: Fix conditional loading snippet

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Rico Sta. Cruz 2018-08-20 09:03:18 +08:00
parent 2e381a4c77
commit d5a6d6fb04
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1 changed files with 5 additions and 15 deletions
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20
polyfill.io.md
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@ -14,26 +14,22 @@ intro: |
```html
<script src="https://cdn.polyfill.io/v2/polyfill.min.js"></script>
```
{: .-wrap}
This is the default script for Polyfill.io.
### References
- [API example](https://polyfill.io/v2/docs/api) _(polyfill.io)_
- [List of features](https://polyfill.io/v2/docs/features) _(polyfill.io)_
* [API example](https://polyfill.io/v2/docs/api) _(polyfill.io)_
* [List of features](https://polyfill.io/v2/docs/features) _(polyfill.io)_
## Optimized
### For modern browsers
```html
<script>(function(d,s){
if(window.Promise&&[].includes&&Object.assign&&window.Map)return;
var sc=d.getElementsByTagName(s)[0],js=d.createElement(s);
js.src='https://cdn.polyfill.io/v2/polyfill.min.js';
sc.parentNode.insertBefore(js, sc);
}(document,'script'))</script>
<script>if(!(window.Promise&&[].includes&&Object.assign&&window.Map)){document.write('<script src="https://cdn.polyfill.io/v2/polyfill.min.js"></scr'+'ipt>')}</script>
```
This only includes polyfill.io when necessary, skipping it for modern browsers for faster load times.
@ -41,13 +37,7 @@ This only includes polyfill.io when necessary, skipping it for modern browsers f
### Extra features
```html
<script>(function(d,s){
if(window.fetch&&window.Promise&&[].includes&&Object.assign&&window.Map)return;
var sc=d.getElementsByTagName(s)[0],js=d.createElement(s);
js.src='https://cdn.polyfill.io/v2/polyfill.min.js?features=default,fetch';
sc.parentNode.insertBefore(js, sc);
}(document,'script'))</script>
<script>if(!(window.fetch&&window.Promise&&[].includes&&Object.assign&&window.Map)){document.write('<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=default,fetch"></scr'+'ipt>')}</script>
```
{: data-line="2,4"}
This is the same as the previous, but also adds a polyfill for `window.fetch()`. We add a `window.fetch` check and loads the additional `fetch` feature.