c4fd05c0c2
* Spec compatibility for template literals. * Update preset-es2015 `spec` expected case. * Prevent array mutability by replacing `shift`. * Fix condition for single item. * Group concats to ensure toPrimitive sequence. * Update function test case. * Add semi for function test case. * Simplify concat call expressions creating. * Fix some cases with multiple idengifiers. * Add test case with different literals. * Add test case for `Symbol()` and toPrimitive order * Add actual literal case. * Add minNodeVersion to template literals order. * Flip the logical expression. * Update README for template literals spec option. * docs [skip ci]
91 lines
1.3 KiB
Markdown
91 lines
1.3 KiB
Markdown
# babel-plugin-transform-es2015-template-literals
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> Compile ES2015 template literals to ES5
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## Example
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**In**
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```javascript
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`foo${bar}`;
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```
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**Out**
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```javascript
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"foo" + bar;
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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-es2015-template-literals
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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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Without options:
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```json
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{
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"plugins": ["transform-es2015-template-literals"]
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}
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```
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With options:
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```json
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{
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"plugins": [
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["transform-es2015-template-literals", {
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"loose": true,
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"spec": true
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}]
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]
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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-es2015-template-literals 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-es2015-template-literals"]
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});
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```
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## Options
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### `loose`
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`boolean`, defaults to `false`.
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In loose mode, tagged template literal objects aren't frozen.
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### `spec`
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`boolean`, defaults to `false`.
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This option combines all template literal expressions and quasis with `String.prototype.concat`. It will handle cases with `Symbol.toPrimitive` correctly and throw correctly if template literal expression is a `Symbol()`. See [babel/babel#5791](https://github.com/babel/babel/pull/5791).
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**In**
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```javascript
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`foo${bar}baz${quux}${1}`;
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```
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**Out**
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```javascript
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"foo".concat(bar, "baz").concat(quux, 1);
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```
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