vendredi 2 septembre 2016

Basic JavaScript function [duplicate]

This question already has an answer here:

just starting with JavaScript and trying to teach myself through simple exercises. I have made this very simple little program which works as expected:

<!DOCTYPE html>
<html>
    <head>

        <title>Exercise</title>

        <script type="text/javascript">

            function doSomething(){

            alert("you clicked the text");

            }

        </script>

    </head>

    <body>

        <p id="text" onclick="doSomething()"> This is some text </p>

    </body>

</html>

When you click the text, the alert appears. Then I have modified it slightly to this:

<!DOCTYPE html>
<html>
    <head>

        <title>Exercise 2</title>

        <script type="text/javascript">

            var whenClicked = document.getElementById("text");

            whenClicked.onclick = doSomething();

            function doSomething(){

                alert("you clicked the text");
            }

        </script>

    </head>

    <body>

        <p id="text"> This is some text </p>

    </body>

</html>

Expecting it to work exactly in the same way, but when I load the document on the web browser, the alert appears straight away, without me clicking on the text. Why is this happening? Thanks P.




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