Wechat doesn't have any official deep linking URL for sending a text. However, if you can add some JavaScript Code in your mobile web, you can achieve the share functionality.
Check out Send to chat
documentation on Wechat JS SDK.
From JS SDK Documentation:-
wx.onMenuShareAppMessage({
title: '', // Sharing title
desc: '', // Sharing description
link: '', // Sharing link
imgUrl: '', // Sharing image URL
type: '', // Sharing type, such as “music”, “video “ or “link”. It is “link” by default.
dataUrl: '', // The data URL should be provided for items of type “music” or “video”. It is null by default.
success: function () {
// Callback function executed after a user confirms sharing
},
cancel: function () {
// Callback function executed after a user cancels sharing
}
});
We do have some unofficial deep linking URL like you mentioned. But it may stop work anytime if Wechat decided to change it.
Here is some of them below, sadly I don't know any URL to share a text to chat.
weixin://
- to open Wechat app (if installed)
weixin://dl/chat
- to open chat screen of Wechat
weixin://dl/moments
- to open user moements
weixin://dl/profile
- to open user profile
weixin://dl/settings
- to open settings page