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How to get image size (height & width) using JavaScript?
...ing Javascript...
const img = new Image();
img.onload = function() {
alert(this.width + 'x' + this.height);
}
img.src = 'http://www.google.com/intl/en_ALL/images/logo.gif';
This can be useful if the image is not a part of the markup.
...
Code for a simple JavaScript countdown timer?
...
I wrote this script some time ago:
Usage:
var myCounter = new Countdown({
seconds:5, // number of seconds to count down
onUpdateStatus: function(sec){console.log(sec);}, // callback for each second
onCounterEnd: function(...
How to inspect Javascript Objects
...
There are few methods :
1. typeof tells you which one of the 6 javascript types is the object.
2. instanceof tells you if the object is an instance of another object.
3. List properties with for(var k in obj)
4. Object.getOwnPropertyNames( anObjectToInspect )
5. Object.getPrototypeOf( ...
how to show alternate image if source image is not found? (onerror working in IE but not in mozilla)
...ge.
NEW
I would like to add a jQuery way, if this can help anyone.
<script>
$(document).ready(function()
{
$(".backup_picture").on("error", function(){
$(this).attr('src', './images/nopicture.png');
});
});
</script>
<img class='backup_picture' src='./images/nonex...
What is the difference between substr and substring?
...s parameters as (from, length).
Update: MDN considers substr legacy.
alert("abc".substr(1,2)); // returns "bc"
alert("abc".substring(1,2)); // returns "b"
You can remember substring takes indices, as does yet another string extraction method, slice.
When starting from 0 you can use either m...
CDHtmlDialog的基本使用（C++调用JS函数的实现） - C/C++ - 清泛网 - 专注IT技能提升
...ppInteractive.htm中添加一个js函数供C++调用，代码如下：
<script type="text/javascript">
function CppCallJsFunc() {
alert("JS alert弹出框！");
}
</script>
JSCppInteractiveDlg.h末尾添加如下代码：
HRESULT CallJSFunction(IHTMLDocument2* pDoc2,
CString strFu...
CDHtmlDialog的基本使用（C++调用JS函数的实现） - C/C++ - 清泛网 - 专注IT技能提升
...ppInteractive.htm中添加一个js函数供C++调用，代码如下：
<script type="text/javascript">
function CppCallJsFunc() {
alert("JS alert弹出框！");
}
</script>
JSCppInteractiveDlg.h末尾添加如下代码：
HRESULT CallJSFunction(IHTMLDocument2* pDoc2,
CString strFu...
CDHtmlDialog的基本使用（C++调用JS函数的实现） - C/C++ - 清泛网移动版 -...
...ppInteractive.htm中添加一个js函数供C++调用，代码如下：
<script type="text/javascript">
function CppCallJsFunc() {
alert("JS alert弹出框！");
}
</script>
JSCppInteractiveDlg.h末尾添加如下代码：
HRESULT CallJSFunction(IHTMLDocument2* pDoc2,
CString strFu...
CDHtmlDialog的基本使用（C++调用JS函数的实现） - C/C++ - 清泛网移动版 -...
...ppInteractive.htm中添加一个js函数供C++调用，代码如下：
<script type="text/javascript">
function CppCallJsFunc() {
alert("JS alert弹出框！");
}
</script>
JSCppInteractiveDlg.h末尾添加如下代码：
HRESULT CallJSFunction(IHTMLDocument2* pDoc2,
CString strFu...
CDHtmlDialog的基本使用（C++调用JS函数的实现） - C/C++ - 清泛网移动版 -...
...ppInteractive.htm中添加一个js函数供C++调用，代码如下：
<script type="text/javascript">
function CppCallJsFunc() {
alert("JS alert弹出框！");
}
</script>
JSCppInteractiveDlg.h末尾添加如下代码：
HRESULT CallJSFunction(IHTMLDocument2* pDoc2,
CString strFu...