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javascript - How to enable the browser to scan the QR code and then open the app related page

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Release： 2016-10-10 11:55:58
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How to use the browser to scan the QR code to determine whether the app is installed on the phone. If it is installed, open the relevant page of the app. If not, jump directly to the download page of the app. If it is the QR code that comes with the app, Scan the QR code and continue processing business

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How to use the browser to scan the QR code to determine whether the app is installed on the phone. If it is installed, open the relevant page of the app. If not, jump directly to the download page of the app. If it is the QR code that comes with the app, Scan the QR code and continue processing business

If you need APP cooperation~~ you can search url schema or app schema related articles to learn more.
The idea is this:
The QR code is an intermediate page. It is recommended that this page be directly the download page.
Then the JS on this page tries to pull up the APP through the schema.
If installed, it will start. . It's stuck on this download page without installation. .

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html5 javascript php
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