npm i ajax-cache --save

$.ajax({
    url: "http://rapapi.org/mockjsdata/9195/common/getRandom",
    dataType:'json',
    localCache: 'snapshot',
    success: function(res) {
        if (res.snapshot) {
            console.log('[snapshot] ' + res.data);
        } else {
            console.log('[remote data] ' + res.data);
        }
    }
});

$.ajax({
    url: "http://rapapi.org/mockjsdata/9195/common/getRandom",
    dataType:'json',
    localCache: 5000,
    success: function(res) {
        console.log('\n[Caching for 5 seconds] ' + res.data);
    }
});

$.ajax({
    url: "http://rapapi.org/mockjsdata/9195/common/getRandom",
    dataType:'json',
    localCache: false,
    success: function(res) {
        console.log('Cache has been cleared');
        console.log(res.data);
    }
});

$.ajaxCache.clear();

$.ajaxCache.set({
    storage: 'localStorage',        //存储方式，默认"localStorage"，可选择"sessionStorage"
    cacheNamePrefix: '_ajaxcache'   //存储前缀，通常不需要修改
});