fb9a752262
* Create "babel-helper-wrap-function" It contains the logic to wrap a function inside a call expression. It was part of the "babel-helper-remap-async-to-generator" package, but it is needed to transpile "function.sent" * Create "babel-transform-function-sent" It transforms the "function.sent" meta property by replacing it with "yield" and making the generator ignore the first ".next()" call. * "function.sent" is the last value passed to .next(), not the first one * Disable exec tests on old node * Fix flow error * Add "transform-function-sent" to "stage-2" preset * Do every trasformation in one traversal * Test for "yield function.sent" * [skip ci] * Fix some typos [skip ci]
67 lines
1.1 KiB
Markdown
67 lines
1.1 KiB
Markdown
# babel-plugin-transform-function-sent
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> Compile the `function.sent` meta property, used inside generator functions, to valid ES2015 code.
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## Example
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```js
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function* generator() {
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console.log("Sent", function.sent);
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console.log("Yield", yield);
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}
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const iterator = generator();
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iterator.next(1); // Logs "Sent 1"
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iterator.next(2); // Logs "Yield 2"
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```
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Is compiled roughly to
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```js
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let generator = _skipFirstGeneratorNext(function* () {
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const _functionSent = yield;
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console.log("Sent", _functionSent);
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console.log("Yield", yield);
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});
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const iterator = generator();
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iterator.next(1); // Logs "Sent 1"
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iterator.next(2); // Logs "Yield 1"
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```
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## Installation
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```sh
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npm install --save-dev babel-plugin-transform-function-sent
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```
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## Usage
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### Via `.babelrc` (Recommended)
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**.babelrc**
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```json
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{
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"plugins": ["transform-function-sent"]
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}
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```
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### Via CLI
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```sh
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babel --plugins transform-function-sent script.js
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```
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### Via Node API
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```javascript
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require("babel-core").transform("code", {
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plugins: ["transform-function-sent"]
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});
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```
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## References
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* [Proposal](https://github.com/allenwb/ESideas/blob/master/Generator%20metaproperty.md)
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