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78 lines
1.3 KiB
Markdown
78 lines
1.3 KiB
Markdown
# deprecation
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> Log a deprecation message with stack
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## Usage
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<table>
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<tbody valign=top align=left>
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<tr><th>
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Browsers
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</th><td width=100%>
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Load `deprecation` directly from [cdn.pika.dev](https://cdn.pika.dev)
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```html
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<script type="module">
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import { Deprecation } from "https://cdn.pika.dev/deprecation/v2";
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</script>
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```
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</td></tr>
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<tr><th>
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Node
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</th><td>
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Install with `npm install deprecation`
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```js
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const { Deprecation } = require("deprecation");
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// or: import { Deprecation } from "deprecation";
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```
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</td></tr>
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</tbody>
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</table>
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```js
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function foo() {
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bar();
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}
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function bar() {
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baz();
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}
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function baz() {
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console.warn(new Deprecation("[my-lib] foo() is deprecated, use bar()"));
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}
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foo();
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// { Deprecation: [my-lib] foo() is deprecated, use bar()
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// at baz (/path/to/file.js:12:15)
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// at bar (/path/to/file.js:8:3)
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// at foo (/path/to/file.js:4:3)
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```
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To log a deprecation message only once, you can use the [once](https://www.npmjs.com/package/once) module.
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```js
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const Deprecation = require("deprecation");
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const once = require("once");
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const deprecateFoo = once(console.warn);
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function foo() {
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deprecateFoo(new Deprecation("[my-lib] foo() is deprecated, use bar()"));
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}
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foo();
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foo(); // logs nothing
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```
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## License
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[ISC](LICENSE)
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