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[Angular] FormBuildAPI
Using FormBuilder API can simply our code, for example we want to refactor following code by using FormBuilder:
form = new FormGroup({ store: new FormGroup({ branch: new FormControl(‘‘), code: new FormControl(‘‘) }), selector: this.createStock({}), stock: new FormArray([ this.createStock({ product_id: 1, quantity: 10 }), this.createStock({ product_id: 3, quantity: 50 }), ]) });
First thing we need to do is actually inject FormBuilder:
constructor( private fb: FormBuilder ) {}
Then:
form = this.fb.group({ store: this.fb.group({ branch: ‘‘, code: ‘‘ }), selector: this.createStock({}), stock: this.fb.array([ this.createStock({ product_id: 1, quantity: 10 }), this.createStock({ product_id: 3, quantity: 50 }), ]) }); createStock(stock) { return this.fb.group({ product_id: parseInt(stock.product_id, 10) || ‘‘, quantity: stock.quantity || 10 }); }
So as you can see, you replace all new FormGroup() and new FormArray() by just fb.group & fb.array.
And meanwhile, we don‘t need FormControl any more, because FormBuild understand that it should be a FormControl.
[Angular] FormBuildAPI
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