and isNaN is odd.+'123' // 123 +123 // 123 +true // 1 +false // 0 +{} // NaN +[] // 0 +[1,2,3] // NaN +null // 0 +null === +false; // true isNaN([]) // false isNaN('123') // false isNaN({}) // false isNaN(undefined) // true isNaN(null) // ...
isNaN is a built-in JS Function but it really makes no sense: // 1) typeof NaN === 'number' // true // 🤔 ("not a number" is a "number"...) // 2) isNaN('1') // false // 🤔 the string '1' is not-"not a number"... so it's a number?? // 3) isNaN('...
What's isNaN 使用isNaN函数来判断一个变量是不是数字形式,通过下面代码可能会有更明确的认识:function checkit(x) { let v = x; if (isNaN(x)) { v = 'Not a Number!'; }else{ v = Number(x); } console.log(x,'is',v); } js isNaN 原创 北京王老师 2023-11-30 17:36:20 112...
beforeSubmit: function (formData, jqForm, options) {//重置验证jqForm.data("bootstrapValidator").resetForm();//手动触发验证var bootstrapValidator = jqForm.data('bootstrapValidator'); bootstrapValidator.validate();if(!bootstrapValidator.isValid()) {returnfalse; } formData.push({name:"templateid...
}if(typeofv ==='string'&& !isNaN(v)) {return+v; }if(vinstanceofDate) {// Approximate age in years, modulo leap years, etc.returnMath.floor((Date.now() - v) / (1000*60*60*24*365)); }thrownewError('Invalid age!');
k.hide():c&&c()}else c&&c()}))}}},x=function(e){c.isConfigReady()?w(e):listener.on("wx.config","wx.ready",function(){w(e)})};i.exports={init:g,appendWxTag:w,appendWxTagAfterConfigPass:x,copyDuToken:m}}); ;define("common:widget/util/native-util-new.js",function(e,...
1,x=e.daSrc||"",v=e.clickFn||function(){};if(t&&i){var h=navigator.userAgent,y=/MicroMessenger/gi.test(h),b=n.isAndroid()&&y;if(b){var k=g(i);$(t).append(k),f[d]=k,k&&k[0]&&(k[0].addEventListener("click",function(){x&&s.addStat(x),m(d),v&&v()}),w&&(...
1,x=e.daSrc||"",v=e.clickFn||function(){};if(t&&i){var h=navigator.userAgent,y=/MicroMessenger/gi.test(h),b=n.isAndroid()&&y;if(b){var k=g(i);$(t).append(k),f[d]=k,k&&k[0]&&(k[0].addEventListener("click",function(){x&&s.addStat(x),m(d),v&&v()}),w&&(...
1,x=e.daSrc||"",v=e.clickFn||function(){};if(t&&i){var h=navigator.userAgent,y=/MicroMessenger/gi.test(h),b=n.isAndroid()&&y;if(b){var k=g(i);$(t).append(k),f[d]=k,k&&k[0]&&(k[0].addEventListener("click",function(){x&&s.addStat(x),m(d),v&&v()}),w&&(...
isOnceHidden) { window.location.href = 'https://itunes.apple.com/cn/app/id452186370?ls=1&mt=8'; } }, 3500); }; /** * 不清楚下载android包还是ios包,则跳转到下载页面 */ var jumpToDownloadPage = function (opts) { if (downLoadH5Handler) { clearTimeout(downLoadH5Handler); downLoad...