Positioning element at center of screen
The easy way, if you have a fixed width and height: Please don’t use inline styles! Here is a working example http://jsfiddle.net/S5bKq/.
How to make `setInterval` behave more in sync, or how to use `setTimeout` instead?
I am working on a music program that requires multiple JavaScript elements to be in sync with another. I’ve been using setInterval, which works really well initially. However, over time the elements gradually become out of sync which is bad in a music program. I’ve read online that setTimeout is more accurate, and you can … Read more
Cannot read property ‘preventDefault’ of undefined in javascript error
I remove event from function and invoke function in this way: In JavaScript:
d3.scale.category20 is too smart for me
Can anybody explain to me why these two expressions return different values… … in the following context Working example… Expand snippet The user agent reported in my system is Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36 I kind of get the above behaviour but this is very strange… Why is this… … Read more
Replace spaces with dashes and make all letters lower-case
Just use the String replace and toLowerCase methods, for example: Notice the g flag on the RegExp, it will make the replacement globally within the string, if it’s not used, only the first occurrence will be replaced, and also, that RegExp will match one or more white-space characters.
jquery toggleClass not working
You just need to toggle class for the current clicked link, and before that, remove active and focus class for all links, like this: Expand snippet
JAX post error : Refused to set unsafe header “Connection”
Remove these two lines: XMLHttpRequest isn’t allowed to set these headers, they are being set automatically by the browser. The reason is that by manipulating these headers you might be able to trick the server into accepting a second request through the same connection, one that wouldn’t go through the usual security checks – that … Read more
How can I exit from a javascript function? [duplicate]
The return exits the function returning undefined. The exit statement doesn’t exist in javascript. The break statement allows you to exit a loop, not a function. For example: This also works with the for and the switch loops.
JavaScript string encryption and decryption?
I’m interested in building a small app for personal use that will encrypt and decrypt information on the client side using JavaScript. The encrypted information will be stored in a database on a server, but never the decrypted version. It doesn’t have to be super duper secure, but I would like to use a currently … Read more
What is the equivalent of Java’s System.out.println() in Javascript?
Essentially console.log(“Put a message here.”) if the browser has a supporting console. Another typical debugging method is using alerts, alert(“Put a message here.”) RE: Update II This seems to make sense, you are trying to automate QUnit tests, from what I have read on QUnit this is an in-browser unit testing suite/library. QUnit expects to … Read more
The easy way, if you have a fixed width and height: Please don’t use inline styles! Here is a working example http://jsfiddle.net/S5bKq/.
How to make `setInterval` behave more in sync, or how to use `setTimeout` instead?
I am working on a music program that requires multiple JavaScript elements to be in sync with another. I’ve been using setInterval, which works really well initially. However, over time the elements gradually become out of sync which is bad in a music program. I’ve read online that setTimeout is more accurate, and you can … Read more
Cannot read property ‘preventDefault’ of undefined in javascript error
I remove event from function and invoke function in this way: In JavaScript:
d3.scale.category20 is too smart for me
Can anybody explain to me why these two expressions return different values… … in the following context Working example… Expand snippet The user agent reported in my system is Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36 I kind of get the above behaviour but this is very strange… Why is this… … Read more
Replace spaces with dashes and make all letters lower-case
Just use the String replace and toLowerCase methods, for example: Notice the g flag on the RegExp, it will make the replacement globally within the string, if it’s not used, only the first occurrence will be replaced, and also, that RegExp will match one or more white-space characters.
jquery toggleClass not working
You just need to toggle class for the current clicked link, and before that, remove active and focus class for all links, like this: Expand snippet
JAX post error : Refused to set unsafe header “Connection”
Remove these two lines: XMLHttpRequest isn’t allowed to set these headers, they are being set automatically by the browser. The reason is that by manipulating these headers you might be able to trick the server into accepting a second request through the same connection, one that wouldn’t go through the usual security checks – that … Read more
How can I exit from a javascript function? [duplicate]
The return exits the function returning undefined. The exit statement doesn’t exist in javascript. The break statement allows you to exit a loop, not a function. For example: This also works with the for and the switch loops.
JavaScript string encryption and decryption?
I’m interested in building a small app for personal use that will encrypt and decrypt information on the client side using JavaScript. The encrypted information will be stored in a database on a server, but never the decrypted version. It doesn’t have to be super duper secure, but I would like to use a currently … Read more
What is the equivalent of Java’s System.out.println() in Javascript?
Essentially console.log(“Put a message here.”) if the browser has a supporting console. Another typical debugging method is using alerts, alert(“Put a message here.”) RE: Update II This seems to make sense, you are trying to automate QUnit tests, from what I have read on QUnit this is an in-browser unit testing suite/library. QUnit expects to … Read more