就像“whatsapp://send?”text=" + encodeURIComponent(你的文本在这里)，它肯定会工作。

上面的答案有点过时了。虽然这些方法工作，但通过使用下面的方法，您可以将任何文本共享到一个预定义的数字。下面的方法适用于android, WhatsApp web, IOS等。

你只需要使用下面的格式:

<a href="https://api.whatsapp.com/send?phone=whatsappphonenumber&text=urlencodedtext"></a>

更新—从现在开始使用(2018年11月)

<a href="https://wa.me/whatsappphonenumber/?text=urlencodedtext"></a>

Use: https://wa.me/15551234567 Don't use: https://wa.me/+001-(555)1234567 To create your own link with a pre-filled message that will automatically appear in the text field of a chat, use https://wa.me/whatsappphonenumber/?text=urlencodedtext where whatsappphonenumber is a full phone number in international format and URL-encodedtext is the URL-encoded pre-filled message. Example:https://wa.me/15551234567?text=I'm%20interested%20in%20your%20car%20for%20sale To create a link with just a pre-filled message, use https://wa.me/?text=urlencodedtext Example:https://wa.me/?text=I'm%20inquiring%20about%20the%20apartment%20listing After clicking on the link, you will be shown a list of contacts you can send your message to.

欲了解更多信息，请参见https://www.whatsapp.com/faq/en/general/26000030

一般来说，只在iOS或Android设备上使用java脚本显示Whatsapp Link是有意义的:

   if (navigator.userAgent.match(/iPhone|Android/i)) {
      document.write('<a href="whatsapp://send?text=See..">Share on WhatApp</a>');
   }

就像“whatsapp://send?”text=" + encodeURIComponent(你的文本在这里)，它肯定会工作。

根据桌面或移动平台切换whatsapp分享链接。

在链接中提供电话号码或不提供电话号码都可以。

为移动

   vm.LinkTextToShare = 'https://api.whatsapp.com/send?text=' + encodeURIComponent(window.location.href) ;

   window.open(vm.LinkTextToShare,"_blank");

对于桌面

   vm.LinkTextToShare = 'https://web.whatsapp.com/send?l=en&text=' + encodeURIComponent(window.location.href) ;

   window.open(vm.LinkTextToShare,"_blank");

如果你想在浏览器中打开whatsapp，这是正确的:

<a href=`https://web.whatsapp.com/send?text=${yout URL or TEXT}` ><Whatsapp</a>