Check if the CSS is already injected or not

[Zeeshan]

Hi all,

I want to check if the CSS I want to inject is previously injected or not, is there any way we can check it?

When I try to register some of my own CSS I am getting an error it is already injected.

Thanks

Zeeshan

[Neil Fraser]

The `injected` property in css.ts is private, so there's currently no way to check.  However, would wrapping your register call in a try catch work for you?

try {

  Blockly.Css.register(yourCss);

} catch (_e) {

  // Must be already injected.

}

Alternatively, you could store that you've already registered the CSS somewhere.

let hasRegistered = false;

yourFunction() {

  if (!hasRegistered) {

    Blockly.Css.register(yourCss);

    hasRegistered = true;

  }

}

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Neil Fraser, Switzerland
https://neil.fraser.name