H5 web page determines whether an app is installed. If it is installed, it will jump to the summary of the scheme to download if it is not installed

H5 The web page determines whether a APP, After installation, jump to the scheme summary of downloading without installation

1. Demand background

• Recently developed H5 The project has a requirement , namely H5 The web page determines whether a APP, If installed, skip to APP, If it is not installed, go to the download page .

Solution

• Call the following functions ：

• 
  // androidDeal： Android app scheme agreement （ Android development provides ）,iosDeal：iOS app scheme agreement （iOS Development and supply ）,androidUrl： Android app Download link ,iosUrl：iOS app Download link 
  /*  Post examples app： androidDeal: 'com.baidu.tieba://app', iosDeal: 'com.baidu.tieba://', androidUrl: 'https://shouji.baidu.com/software/31866832.html', iosUrl: 'https://itunes.apple.com/cn/app/id477927812', */
  const openApp =