Custom keyboard is used in html, input is set to readonly property, how to get input focus again?

html uses a custom keyboard and sets the input to the readonly property. How to get the input focus again or how to disable the system keyboard, using a custom keyboard, the focus can be displayed?

Apr.16,2021

get one: after
http://jsrun.net/h3gKp/edit


set the readonly,input input box to read-only, but of course you can't get the cursor

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