npm i mockjs-fetch --save

import Mock from ‘mockjs‘;
import mockFetch from ‘mockjs-fetch‘;
mockFetch(Mock);
 
Mock.setup({timeout: 400});
Mock.setup({timeout: ‘200-400‘});
 
Mock.mock(/testMockFetch\.json/, {
    code: 0,
    data: {
        total: 47,
        ‘data|10‘: [
            {
                name: ‘小茗同学‘,
                age: 18,
                address: ‘中国北京朝阳区‘
            },
        ],
    },
});

import ‘./mock.js‘

fetch(‘/aaa/testMockFetch.json‘).then(resp => resp.json()).then(resp => {
    console.log(‘输出结果：‘, resp);
})