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JQuery: detect change in input field [duplicate]
...query change event
Description: Bind an event handler to the "change" JavaScript event,
or trigger that event on an element.
An example
$("input[type='text']").change( function() {
// your code
});
The advantage that .change has over .keypress , .focus , .blur is that .change event wi...
Using Phonegap for Native Application development [closed]
...011/03/developing-better-phonegap-apps/
http://jslint.com/ - to debug your javascript
http://zeptojs.com/ and http://xuijs.com/ - minimal alternative frameworks to jquery and jqtouch
Disable the accelerometer and location http://blogs.nitobi.com/jesse/2009/10/28/running-jqtouch-in-phonegap/
set ...
How Many Seconds Between Two Dates?
...e reference is the MDN site
Alternatively, if your dates come in a format javascript can parse
var dif = Date.parse(MM + " " + DD + ", " + YYYY) - Date.parse(NN + " " + EE + ", " + ZZZZ);
and then you can use that value as the difference in milliseconds (dif in both my examples has the same mean...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...lib64/gconv/gconv-modules.cache
[...]
2、列出与open系统调用相关的跟踪点函数名：
# bpftrace -l 'tracepoint:syscalls:sys_enter_open*'
tracepoint:syscalls:sys_enter_open_by_handle_at
tracepoint:syscalls:sys_enter_open
tracepoint:syscalls:sys_enter_openat
3、工具开始运...
How to access custom attributes from event object in React?
...nction(i) {
// do whatever
},
Notice the bind(). Because this is all javascript, you can do handy things like that. We no longer need to attach data to DOM nodes in order to keep track of them.
IMO this is much cleaner than relying on DOM events.
Update April 2017: These days I would write o...
HTML5 Canvas vs. SVG vs. div
... movable "nodes." Canvas nodes were objects I created and kept track of in Javascript. HTML nodes were movable Divs.
I added 100,000 nodes to each of my two tests. They performed quite differently:
The HTML test tab took forever to load (timed at slightly under 5 minutes, chrome asked to kill the ...
Increase font size chrome console
...use to Chrome ⌘ ⇧ + apparently means "Zoom Content". If you are in the Javascript console, and do ⌘ ⇧ +, the window's content area in zoomed in. But doing a Zoom-out ⌘ - moves the focus back to the console and zooms it out. Result: The content is getting larger, the console smaller. Aaargg...
What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
...emonstrating how it works:
A traditional if-else construct in C, Java and JavaScript is written:
if (a > b) {
result = x;
} else {
result = y;
}
This can be rewritten as the following statement:
result = a > b ? x : y;
Basically it takes the form:
boolean statement ? true result : ...
How can I check whether Google Maps is fully loaded?
...aps into my web site. Once Google Maps is loaded, I need to kick off a few JavaScript processes.
9 Answers
...
how to get the last character of a string?
...do you mean by a "UTF-8 string"? The phrase makes no sense. FWIW though, JavaScript strings are funny beasts themselves: they are sequences of unsigned 16-bit integer values. If the intent of your string is to store characters, then the code above returns the last 16-bit value, which would not be...