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WeakRef basic demo
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| let target = {}; | |
| let wr = new WeakRef(target); | |
| let fg = new FinalizationGroup((iter) => { | |
| for(const i of iter) { | |
| log(i); | |
| } | |
| }); | |
| fg.register(target, "hello world"); | |
| target = null; | |
| setTimeout(gc, 0); | |
| log('If everything goes well, the garbage collector should be greeting you soon!'); | |
| function log(msg) { | |
| console.log(msg); | |
| htmlConsole.log(msg); | |
| } | |
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>WeakRef Demo</title> | |
| <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1"> | |
| <script src="https://bl.ocks.org/mhofman/raw/fe170f9492196e9eb09907c84ea28999/html-console.js"></script> | |
| <script src="./demo-weak-ref.js"></script> | |
| </head> | |
| <body> | |
| <div>Make sure to run chrome with <pre>--js-flags="--expose-gc --harmony-weak-refs"</pre></div> | |
| <div>Valid as of Chrome 74.0.3721.1</div> | |
| <div id="console"></div> | |
| </body> | |
| </html> |
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