This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
JavaScript logic for isNaN()
Hey all I want is to check that the entered value in a textbox is not a number or without using the function isNaN();. Is there any way?
parseFloat(value)!== +value;
But what is wrong with isNaN(value)?
Related
This question already has answers here:
How do I redirect to another webpage?
(58 answers)
Closed 4 years ago.
Hello programmers this is my question today, what function in jquery do i need so when a counter reach the number 100 that page is redirected to the main menu?
Check the counter's value with an if statement and if the value is 100, then simply:
window.location.href = 'http://example.com';
There is no need for JQuery in this.
This question already has answers here:
How can I check if an element exists in the visible DOM?
(27 answers)
Closed 4 years ago.
What is the proper way to check if an html element exist in a webpage.
I do like this:
if (document.getElementById('container') !== null) {doThis()}
How good is this?
What are other ways?
Answered
I was looking for
document.body.contains(element))
This question already has answers here:
Check a radio button with javascript
(7 answers)
Closed 5 years ago.
Quick question I'm unable to resolve... I have a radio button with values of yes or no.
Basically I'm doing this:
if (complete === '1') {
getElementById('test-radio').value('Yes')
}
But it's not setting this to yes, it's still defaulting as no...
Any advice on how I can make this work?
You can use either radioButton.checked=true;
What you are doing isn't javascript syntax.
if (complete === '1') {
getElementById('test-radio').checked=true;
}
This question already has answers here:
How to do case insensitive string comparison?
(23 answers)
Closed 7 years ago.
I am currently programming a simple chatbot but I getting trouble with the input identifier.
if (message.indexOf("how are you")>=0){
send_message("Thanks, Iam good!");
responsiveVoice.speak("Thanks, Iam good!");
Is person is tying in "How are you" the answer will not be triggered since its not lower case. I could copy/paste if state with "How" but is there a easier way? Please be gentle, aim new to programming. Thank you!
Use .toLowerCase()
if (message.toLowerCase().indexOf("how are you") >= 0)
You could try toLowerCase function of javascript.
messaje.toLowerCase().indexOf("how are you")...
Function:
http://www.w3schools.com/jsref/jsref_tolowercase.asp
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
JavaScript data formatting/pretty printer
var theobject_string = '{...}'; // I have a json object as a string.
How can I display this string in a pretty way, on my webpage (html)?
I want this the elements to be indented.
This library does exactly what you're looking for: http://www.cerny-online.com/cerny.js/demos/json-pretty-printing