c0955975f4
Adds a schematic and tslint rule that automatically migrate the consumer from `Renderer` to `Renderer2`. Supports:
* Renaming imports.
* Renaming property and method argument types.
* Casting to `Renderer`.
* Mapping all of the methods from the `Renderer` to `Renderer2`.
Note that some of the `Renderer` methods don't map cleanly between renderers. In these cases the migration adds a helper function at the bottom of the file which ensures that we generate valid code with the same return value as before. E.g. here's what the migration for `createText` looks like.
Before:
```
class SomeComponent {
createAndAddText() {
const node = this._renderer.createText(this._element.nativeElement, 'hello');
node.textContent += ' world';
}
}
```
After:
```
class SomeComponent {
createAndAddText() {
const node = __rendererCreateTextHelper(this._renderer, this._element.nativeElement, 'hello');
node.textContent += ' world';
}
}
function __rendererCreateTextHelper(renderer: any, parent: any, value: any) {
const node = renderer.createText(value);
if (parent) {
renderer.appendChild(parent, node);
}
return node;
}
```
This PR resolves FW-1344.
PR Close #30936
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|---|---|---|
| .. | ||
| google3 | ||
| BUILD.bazel | ||
| README.md | ||
| helpers.ts | ||
| index.ts | ||
| migration.ts | ||
| util.ts | ||
README.md
Renderer -> Renderer2 migration
Automatically migrates from Renderer to Renderer2 by changing method calls, renaming imports
and renaming types. Tries to either map method calls directly from one renderer to the other, or
if that's not possible, inserts custom helper functions at the bottom of the file.
Before
import { Renderer, ElementRef } from '@angular/core';
@Component({})
export class MyComponent {
constructor(private _renderer: Renderer, private _elementRef: ElementRef) {}
changeColor() {
this._renderer.setElementStyle(this._element.nativeElement, 'color', 'purple');
}
}
After
import { Renderer2, ElementRef } from '@angular/core';
@Component({})
export class MyComponent {
constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}
changeColor() {
this._renderer.setStyle(this._element.nativeElement, 'color', 'purple');
}
}