Created
April 4, 2019 16:35
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<div style="display:flex;flex-direction:column;"> | |
<button [click-once]="testClick">Function as parameter</button> | |
<!-- [undefined, undefined, undefined] --> | |
<button [click-once]="testClick2('baba', 'dqdo')">Arrow function closure</button> | |
<!-- ["baba", "dqdo", "4i4o"] --> | |
<button [click-once]="testClick3('baba', 'dqdo')">Decorator</button> | |
<!-- ["baba", "dqdo", undefined] --> | |
<button [click-once]="testClick.bind(this, 'baba', 'dqdo')">Inline bind</button> | |
<!-- ["baba", "dqdo", "4i4o"] --> | |
</div> |
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@Component({ | |
selector: 'component', | |
templateUrl: './component.html' | |
}) | |
export class Component { | |
prop1 = '4i4o'; | |
testClick(param1, param2) { | |
console.log(this); | |
return [param1, param2, this.prop1]; | |
} | |
testClick2 = (param1, param2) => () => this.testClick(param1, param2); | |
@Bind() | |
testClick3(param1, param2) { | |
console.log(this); | |
return [param1, param2, this.prop1]; | |
} | |
} | |
//Decorator factory, returns decorator function | |
function Bind() { | |
return function (target, propertyKey: string | symbol, descriptor: PropertyDescriptor) { | |
//target is this.prototype | |
let originalMethod = descriptor.value; | |
descriptor.value = function (...args) { | |
return () => originalMethod.call(target, ...args); | |
} | |
} | |
} |
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