从另一个组件导入角度函数

// mathUtils.ts
export function calculateSquare(num: number): number {
    return num * num;
}

// componentA.component.ts
import { Component } from '@angular/core';
import { calculateSquare } from './mathUtils';

@Component({
    selector: 'app-component-a',
    templateUrl: './component-a.component.html'
})
export class ComponentA {
    result: number;

    constructor() {
        this.result = calculateSquare(5);
    }
}

// componentB.component.ts
import { Component } from '@angular/core';
import { calculateSquare } from './mathUtils';

@Component({
    selector: 'app-component-b',
    templateUrl: './component-b.component.html'
})
export class ComponentB {
    result: number;

    constructor() {
        this.result = calculateSquare(10);
    }
}

// 错误的导入路径
import { calculateSquare } from './mathUitls';

// 正确的导入路径
import { calculateSquare } from './mathUtils';

// mathUtils.ts
export function calculateSquare(num: number): number {
    return num * num;
}

// componentA.component.ts
import { calculateSquare } from './mathUtils';

// common.utils.ts
export function calculateSquare(num: number): number {
    return num * num;
}

// componentA.component.ts
import { calculateSquare } from './common.utils';

// componentB.component.ts
import { calculateSquare } from './common.utils';