Compatible with the latest firefox, chrome and IE javascript image preview implementation code

Home

Web Front-end

JS Tutorial

Compatible with the latest firefox, chrome and IE javascript image preview implementation code_javascript skills

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 04:40 PM

Javascript implements client-side file selection and then the img tag loads the client-side image to implement image preview.

Test browsers: firefox6, firefox12, chrome 25.0.1364.172 m, IE6-IE10 are all compatible

Safari5.0.4 does not support the FileReader and file.files.item(0).getAsDataURL methods. There is no solution for the time being. You need to upload the file to the server and return the temporary file name and load it with the img tag. I don’t know whether subsequent safari versions support the FileReader object. .

The effect under IE10:

The effect under IE9:

Implementation source code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="txt/html;charset=utf-8" />
<title>javascript实现IE,firefox客户端图片预览</title>
<script>
 //使用IE条件注释来判断是否IE6，通过判断userAgent不一定准确
 if (document.all) document.write('<!--[if lte IE 6]><script type="text/javascript">window.ie6= true<\/script><![endif]-->');
 // var ie6 = /msie 6/i.test(navigator.userAgent);//不推荐，有些系统的ie6 userAgent会是IE7或者IE8
 function change(picId,fileId) {
  var pic = document.getElementById(picId);
  var file = document.getElementById(fileId);
  if(window.FileReader){//chrome,firefox7+,opera,IE10,IE9，IE9也可以用滤镜来实现
   oFReader = new FileReader();
   oFReader.readAsDataURL(file.files[0]);
   oFReader.onload = function (oFREvent) {pic.src = oFREvent.target.result;};  
  }
  else if (document.all) {//IE8-
   file.select();
   var reallocalpath = document.selection.createRange().text//IE下获取实际的本地文件路径
   if (window.ie6) pic.src = reallocalpath; //IE6浏览器设置img的src为本地路径可以直接显示图片
   else { //非IE6版本的IE由于安全问题直接设置img的src无法显示本地图片，但是可以通过滤镜来实现，IE10浏览器不支持滤镜，需要用FileReader来实现，所以注意判断FileReader先
    pic.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='image',src=\"" + reallocalpath + "\")";
    pic.src = 'data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==';//设置img的src为base64编码的透明图片，要不会显示红xx
   }
  }
  else if (file.files) {//firefox6-
   if (file.files.item(0)) {
    url = file.files.item(0).getAsDataURL();
    pic.src = url;
   }
  }
 }
</script>
</head>
<body>
<form name="form1" enctype="multipart/form-data"><table><tr>
<td> 草图1：</td>
<td >
<input type="file" name="file1" id="file1" onchange="change('pic1','file1')">
</td>
<tr>
<td>草图浏览1：</td>
<td>
<img  src="/static/imghwm/default1.png"  data-src="images/px.gif"  class="lazy" id="pic1"  alt="Compatible with the latest firefox, chrome and IE javascript image preview implementation code_javascript skills" >
</td></tr><tr>
<td> 草图2：</td>
<td >
<input type="file" name="file2" id="file2" onchange="change('pic2','file2')">
</td>
<tr>
<td>草图浏览2：</td>
<td>
<img  src="/static/imghwm/default1.png"  data-src="images/px.gif"  class="lazy" id="pic2"  alt="Compatible with the latest firefox, chrome and IE javascript image preview implementation code_javascript skills" >
</td></tr>
</table>
</form>
</body>
</html>

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Replace String Characters in JavaScriptMar 11, 2025 am 12:07 AM

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

Custom Google Search API Setup TutorialMar 04, 2025 am 01:06 AM

This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y

Example Colors JSON FileMar 03, 2025 am 12:35 AM

This article series was rewritten in mid 2017 with up-to-date information and fresh examples. In this JSON example, we will look at how we can store simple values in a file using JSON format. Using the key-value pair notation, we can store any kind

10 jQuery Syntax HighlightersMar 02, 2025 am 12:32 AM

Enhance Your Code Presentation: 10 Syntax Highlighters for Developers Sharing code snippets on your website or blog is a common practice for developers. Choosing the right syntax highlighter can significantly improve readability and visual appeal. T

Build Your Own AJAX Web ApplicationsMar 09, 2025 am 12:11 AM

So here you are, ready to learn all about this thing called AJAX. But, what exactly is it? The term AJAX refers to a loose grouping of technologies that are used to create dynamic, interactive web content. The term AJAX, originally coined by Jesse J

8 Stunning jQuery Page Layout PluginsMar 06, 2025 am 12:48 AM

Leverage jQuery for Effortless Web Page Layouts: 8 Essential Plugins jQuery simplifies web page layout significantly. This article highlights eight powerful jQuery plugins that streamline the process, particularly useful for manual website creation

What is 'this' in JavaScript?Mar 04, 2025 am 01:15 AM

Core points This in JavaScript usually refers to an object that "owns" the method, but it depends on how the function is called. When there is no current object, this refers to the global object. In a web browser, it is represented by window. When calling a function, this maintains the global object; but when calling an object constructor or any of its methods, this refers to an instance of the object. You can change the context of this using methods such as call(), apply(), and bind(). These methods call the function using the given this value and parameters. JavaScript is an excellent programming language. A few years ago, this sentence was

10 JavaScript & jQuery MVC TutorialsMar 02, 2025 am 01:16 AM

This article presents a curated selection of over 10 tutorials on JavaScript and jQuery Model-View-Controller (MVC) frameworks, perfect for boosting your web development skills in the new year. These tutorials cover a range of topics, from foundatio

See all articles