onerror

Detect when an image fails to load in Javascript

心已入冬 提交于 2019-11-26 18:52:32
Is there a way to determine if a image path leads to an actual image, Ie, detect when an image fails to load in Javascript. For a web app, I am parsing a xml file and dynamically creating HTML images from a list of image paths. Some image paths may no longer exist on the server so I want to fail gracefully by detecting which images fail to load and deleting that HTML img element. Note JQuery solutions wont be able to be used(the boss doesn't want to use JQuery, yes I know dont get me started). I know of a way in JQuery to detect when an image is loaded, but not whether it failed. My code to

How to tell if a <script> tag failed to load

亡梦爱人 提交于 2019-11-26 12:06:33
I'm dynamically adding <script> tags to a page's <head> , and I'd like to be able to tell whether the loading failed in some way -- a 404, a script error in the loaded script, whatever. In Firefox, this works: var script_tag = document.createElement('script'); script_tag.setAttribute('type', 'text/javascript'); script_tag.setAttribute('src', 'http://fail.org/nonexistant.js'); script_tag.onerror = function() { alert("Loading failed!"); } document.getElementsByTagName('head')[0].appendChild(script_tag); However, this doesn't work in IE or Safari. Does anyone know of a way to make this work in

How does one use the onerror attribute of an img element

*爱你&永不变心* 提交于 2019-11-26 10:28:11
问题 CSS: .posting-logo-div { } .posting-logo-img { height:120px; width:120px; } .posting-photo-div { height:5px;width:5px;position:relative;top:-140px;left:648px; } .posting-photo-img { height:240px; width:240px; } HTML: <div id=\"image\" class=\"posting-logo-div\"><img src=\"../images/some-logo1.jpg\" onerror=\"this.src=\'../images/no-logo-120.jpg\';\" class=\"posting-logo-img\"></div> <div id=\"photo\" class=\"posting-photo-div\"><img src=\"../images/some-logo2.jpg\" onerror=\"this.src=\'..

VBA: How long does On Error Resume Next work?

社会主义新天地 提交于 2019-11-26 08:36:12
问题 I\'m reading up on how to use On Error Resume Next and I\'m trying to figure out how long that line will apply to the program. On the Microsoft site, I found this sentence: \"An On Error Resume Next statement becomes inactive when another procedure is called.\" What exactly does this mean? What is considered to be a procedure? I ask because I\'m using the line in my program, but I don\'t want it to Resume Next all the runtime errors which occur, just the obvious one on the next line. Code:

What html tags support the onload/onerror javascript event attributes?

女生的网名这么多〃 提交于 2019-11-26 06:46:35
问题 I\'m familiar with the typical use of onload , as in the following: <body onload=\"alert(\'Hello, World!\');\"> ... </body> What are all the html elements that fire a load event? (thus executing javascript supplied in an onload attribute) For example, img is one such tag that will execute the javascript supplied in an onload attribute when some.png has loaded: <img onload=\"someImgLoaded()\" src=\"some.png\" /> 回答1: 'onload' is supported by the following HTML tags: <body>, <frame>, <frameset>

Detect when an image fails to load in Javascript

蓝咒 提交于 2019-11-26 06:37:35
问题 Is there a way to determine if a image path leads to an actual image, Ie, detect when an image fails to load in Javascript. For a web app, I am parsing a xml file and dynamically creating HTML images from a list of image paths. Some image paths may no longer exist on the server so I want to fail gracefully by detecting which images fail to load and deleting that HTML img element. Note JQuery solutions wont be able to be used(the boss doesn\'t want to use JQuery, yes I know dont get me started