javascript - How to get alert message on second click of a button - Stack Overflow

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I would like to know that how can I get an alert message on second click of a button, not on a first click.

ex: <input type="button" value="Message" onclick="showMessage()">

function showMessage(){
    alert("It's a second click message"); // this alert message should be shown on second click of a button
}

I would like to know that how can I get an alert message on second click of a button, not on a first click.

ex: <input type="button" value="Message" onclick="showMessage()">

function showMessage(){
    alert("It's a second click message"); // this alert message should be shown on second click of a button
}

• javascript
• jquery
• html

Share Improve this question Follow edited Aug 10, 2017 at 3:21 Cœur 38.8k2525 gold badges205205 silver badges277277 bronze badges asked Sep 21, 2015 at 6:25 DhanaDhana 72333 gold badges1414 silver badges4141 bronze badges 2

• Do you want it to alert after every first click..? – Rayon Commented Sep 21, 2015 at 6:31
• The question is somewhat ambiguous. You want to track second click/each click after second click/each even click – Tushar Commented Sep 21, 2015 at 6:33

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4 Answers 4

Sorted by: Reset to default 7

Use counter instead..

var count = 0; //global variable
function showMessage() {
  if (count++ == 1) { //Compare and then increment counter
    alert("It's a second click message"); //this alert message will be shown only on second click of a button
  }
}

<input type="button" value="Message" onclick="showMessage()">

If you are not looking for the dbclick event, then you can use a flag to check whether it is the second click to show the alert

var flag;

function showMessage() {
  if (flag) {
    alert("It's a second click message"); // this alert message should be shown on second click of a button
  } else {
    flag = true;
  }
}

<input type="button" value="Message" onclick="showMessage()">

Consider this code, This is alert message after every alternate click:

var count = 1;

function showMessage() {
  if (!(count++ % 2))
    alert("It's a second click message"); //this alert message at every second click
}

<input type="button" value="Message" onclick="showMessage()" />

use ondblclick instead of onclick

Like below

<input type="button" value="Message" ondblclick="showMessage()">

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