jquery文件验证器:如何在成功时调用函数? [英] Jquery file validator : How to call a function on success?
问题描述
我正在使用jquery文件验证器插件。
以下是链接:
http:// adamsanderson.github.io/jQuery-File-Validator/#documentation
我可以在验证之前调用一个函数和 onInvalid 输入。
但是有人能告诉我如果文件是有效的输入,我怎么能调用函数?
这里是代码..
$(el).fileValidator({
onValidation:function(files){/ *在验证文件前调用一次* /},
onInvalid:function(validationType,file){/ *为每个无效文件调用一次* /},
maxSize:'2m',//可选
类型:'image'//可选
});
好的,需要对插件,我不会详细讨论,因为这些更改会传播到整个文件中,但这里是您需要的版本:
/ **
上传文件,只是发现它们太大,或者错误的类型令人沮丧。
`fileValidator`插件允许您在用户开始上传
巨大文件之前发出警告。
用法
-----
只需选择您想要验证的文件输入,并传入回调以处理无效文件。
$(el).fileValidator({
onValidation:function(files){...},
onInvalid:function(validationType,file){...},
maxSize:'2m',//可选
类型:'image'//可选
});
$ b $ /
(函数($){
validFile = true;
$。 fileValidator = function(options){
var validations = [];
var onInvalid = options.onInvalid;
var onValid = options.onValid;
$ for $($ .fileValidator.validations){
if(!options [key]){continue;}
validations.push($ .fileValidator.validations [key](options [key] ,onInvalid,onValid));
}
return function(file){
for(var i = 0,len = validations.length; i< len; i ++){
validations [i] .call(this,file);
}
if(validFile){onValid.call();}
};
$;
$ .fileValidator.validations = {
maxSize:function(maxSize,invalid,valid){
if(typeof maxSize =='string'){
maxSize = $ .fileValidator.sizeToBytes(maxSize);
}
返回函数(文件){
if(file.size> maxSize){i nvalid.call(此, MAXSIZE,文件); validFile = false; }
};
},
类型:函数(contentType,无效,有效){
var isValid;
if(typeof contentType =='function'){
isValid = contentType;
} else if(contentType.constructor === RegExp){
isValid = function(type){return type.match(contentType); };
} else {
isValid = function(type){return〜type.indexOf(contentType); };
}
返回函数(文件){
if(!isValid(file.type)){invalid.call(this,'type',file); validFile = false; }
};
}
};
$ .fn.fileValidator = function(userOptions){
var options = $ .extend({
// Validations
maxSize:null,
类型:null,
//回调
onValidation:$ .fileValidator.doNothing,
onInvalid:$ .fileValidator.doNothing,
onValid:$ .fileValidator.doNothing
},userOptions);
return this.each(function(){
var el = $(this);
var validator = $ .fileValidator($ .extend({},options,el .data()));
el.bind('change',function(event){
var files = this.files || [];
options.onValidation .call(this,files);
for(var i = 0,len = files.length; i< len; i ++){
validator.call(this,files [i]);
}
});
});
};
$ .fileValidator.doNothing = function doNothing(){};
$ .fileValidator.sizeToBytes = function sizeToBytes(size){
var scale = 1; (〜size.indexOf('k')){
scale = 1024;
if
} else if(〜size.indexOf('m')){
scale = 1024 * 1024;
} else if(〜size.indexOf('g')){
scale = 1024 * 1024 * 1024;
}
return parseInt(size,10)* scale;
};
})(jQuery);
像这样使用它:
<$ p $ (){$ b $('input')。fileValidator({
onValidation:function(){validFile = true;},
onInvalid: function(type,file){alert('Error:'+ type);},
onValid:function(){alert('Yay!');},
type:'image',
maxSize:'1m'
});
});
编辑
JS Fiddle Demo
code> validFile 变量从一开始就是true,如果遇到错误,它就会变成false。I am using jquery file validator plugin.
Here is the link :
http://adamsanderson.github.io/jQuery-File-Validator/#documentation
I can call a function before validation and onInvalid input.
But can someone tell me how can i call a function if file is a valid input?
Here is the code..
$( el ).fileValidator({
onValidation: function(files){ /* Called once before validating files */ },
onInvalid: function(validationType, file){ /* Called once for each invalid file */ },
maxSize: '2m', //optional
type: 'image' //optional
});
Ok, a few changes need to be done to the plugin, I will not go into details as theses changes are spread in the entire file, but here is the version you need:
/**
Uploading files, only to find that they are too large, or the wrong type is frustrating.
The `fileValidator` plugin lets you warn users before they start uploading
enormous files.
Usage
-----
Simply select the file inputs you wish to validate, and pass in a callbacks to handle invalid files.
$( el ).fileValidator({
onValidation: function(files){ ... },
onInvalid: function(validationType, file){ ... },
maxSize: '2m', //optional
type: 'image' //optional
});
*/
(function($){
validFile = true;
$.fileValidator = function(options){
var validations = [];
var onInvalid = options.onInvalid;
var onValid = options.onValid;
for (var key in $.fileValidator.validations){
if (!options[key]){ continue; }
validations.push( $.fileValidator.validations[key](options[key], onInvalid, onValid));
}
return function(file){
for(var i=0, len = validations.length; i < len; i++){
validations[i].call(this, file);
}
if(validFile){onValid.call();}
};
};
$.fileValidator.validations = {
maxSize: function(maxSize, invalid, valid){
if( typeof maxSize == 'string' ){
maxSize = $.fileValidator.sizeToBytes(maxSize);
}
return function(file){
if (file.size > maxSize){ invalid.call(this,'maxSize',file); validFile = false; }
};
},
type: function(contentType, invalid, valid){
var isValid;
if( typeof contentType == 'function' ){
isValid = contentType;
} else if (contentType.constructor === RegExp ) {
isValid = function(type){ return type.match(contentType); };
} else {
isValid = function(type){ return ~type.indexOf(contentType); };
}
return function(file){
if (!isValid(file.type)) { invalid.call(this,'type', file); validFile = false; }
};
}
};
$.fn.fileValidator = function(userOptions) {
var options = $.extend({
// Validations
maxSize: null,
type: null,
// Callbacks
onValidation: $.fileValidator.doNothing,
onInvalid: $.fileValidator.doNothing,
onValid: $.fileValidator.doNothing
}, userOptions);
return this.each(function() {
var el = $(this);
var validator = $.fileValidator( $.extend({}, options, el.data()) );
el.bind('change', function(event){
var files = this.files || [];
options.onValidation.call(this, files);
for(var i=0, len=files.length; i < len; i++){
validator.call(this, files[i]);
}
});
});
};
$.fileValidator.doNothing = function doNothing(){};
$.fileValidator.sizeToBytes = function sizeToBytes(size){
var scale = 1;
if (~ size.indexOf('k')){
scale = 1024;
} else if (~ size.indexOf('m')){
scale = 1024 * 1024;
} else if (~ size.indexOf('g')){
scale = 1024 * 1024 * 1024;
}
return parseInt(size,10) * scale;
};
})( jQuery );
Use it like this:
$(function(){
$('input').fileValidator({
onValidation : function(){ validFile=true; },
onInvalid: function(type, file){ alert('Error: '+type); },
onValid : function(){ alert('Yay!'); },
type: 'image',
maxSize: '1m'
});
});
Edit
The validFile
variable is true from the beginning, and if it meets an error, it becomes false.
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