What does javascript warning mean

javascript warning means popping up a warning box. The setting method is: first press f12 in the browser to open the console; then enter [alert('warning popup')] in the input box and press Enter That’s it.

#In javascript, alert() means popping up a warning box.

We can enter the code in the browser to try to see the effect of alert.

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Setting method:

1. In the browser, press f12 to open the console.

#2. If there is no input box in the lower half of the console, press esc.

#3. The framed part is the input box we need.

4. Enter

alert('warning pop-up')

in the input box and press Enter

5. A warning box pops up and the code takes effect.

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