Alert in an html button

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Hello, I have a button in html and when I click on it I would like to display an alert, how do I do that?

follow the button code:

<input type="submit" class="btn btn-primary" id="btn_cadastro" oneclick="cadastro()"/>

javascript html

asked by anonymous 26.10.2018 / 20:34

3 answers

score 1 · Answer 1

Your button is right, you just need to change the oneclick to onclick.

See the code below:

function cadastro(){
  alert('ok');
}

<input type="submit" class="btn btn-primary" id="btn_cadastro" onclick="cadastro()"/>

score 1 · Answer 2

I think your syntax is incorrect the function call should be "onclick" and not "oneclick" see:

<input type="submit" class="btn btn-primary" id="btn_cadastro" onclick="cadastro()"/>

Make sure your role is declared ...

<script>
    function cadastro(){
       alert('Sua mensagem aqui!');
    }
</script>

score 1 · Answer 3

No HTML

<input type="submit" class="btn btn-primary" id="btn_cadastro" onclick="cadastro();" />

In your JavaScript

function cadastro() {
    alert("Oiii");
}

See an example working:

Your mistake is that you wrote wrong onclick