cropbox.js是一款简单轻量级的头像图片剪裁插件。用户可以上传自己的图片，还可以将图片进行放大和缩小，以及对图片进行拖动，最后可以将图片剪裁生成新的头像图片。 

cropbox.js支持纯js，或结合jquery来使用，或通过YUI来使用。 

纯js调用插件

window.onload = function() {
    var options =
    {
        imageBox: '.imageBox',
        thumbBox: '.thumbBox',
        spinner: '.spinner',
        imgSrc: 'avatar.png'
    }
    var cropper = new cropbox(options);
    document.querySelector('#file').addEventListener('change', function(){
        var reader = new FileReader();
        reader.onload = function(e) {
            options.imgSrc = e.target.result;
            cropper = new cropbox(options);
        }
        reader.readAsDataURL(this.files[0]);
        this.files = [];
    })
    document.querySelector('#btnCrop').addEventListener('click', function(){
        var img = cropper.getDataURL()
        document.querySelector('.cropped').innerHTML += '<img src="'+img+'">';
    })
    document.querySelector('#btnZoomIn').addEventListener('click', function(){
        cropper.zoomIn();
    })
    document.querySelector('#btnZoomOut').addEventListener('click', function(){
        cropper.zoomOut();
    })
};

jquery结合使用

$(window).load(function() {
    var options =
    {
        thumbBox: '.thumbBox',
        spinner: '.spinner',
        imgSrc: 'avatar.png'
    }
    var cropper = $('.imageBox').cropbox(options);
    $('#file').on('change', function(){
        var reader = new FileReader();
        reader.onload = function(e) {
            options.imgSrc = e.target.result;
            cropper = $('.imageBox').cropbox(options);
        }
        reader.readAsDataURL(this.files[0]);
        this.files = [];
    })
    $('#btnCrop').on('click', function(){
        var img = cropper.getDataURL()
        $('.cropped').append('<img src="'+img+'">');
    })
    $('#btnZoomIn').on('click', function(){
        cropper.zoomIn();
    })
    $('#btnZoomOut').on('click', function(){
        cropper.zoomOut();
    })
});
 
// use with require js 
    paths: {
        jquery: 'js/jquery-1.11.0.min',
        cropbox: 'cropbox'
    }
});
require( ["jquery", "cropbox"], function($) {
    var options =
    {
        thumbBox: '.thumbBox',
        spinner: '.spinner',
        imgSrc: 'avatar.png'
    }
    var cropper = $('.imageBox').cropbox(options);
    $('#file').on('change', function(){
        var reader = new FileReader();
        reader.onload = function(e) {
            options.imgSrc = e.target.result;
            cropper = $('.imageBox').cropbox(options);
        }
        reader.readAsDataURL(this.files[0]);
        this.files = [];
    })
    $('#btnCrop').on('click', function(){
        var img = cropper.getDataURL();
        $('.cropped').append('<img src="'+img+'">');
    })
    $('#btnZoomIn').on('click', function(){
        cropper.zoomIn();
    })
    $('#btnZoomOut').on('click', function(){
        cropper.zoomOut();
    })
    }
);

YUI插件使用

YUI().use('node', 'crop-box', function(Y){
    var options =
    {
        imageBox: '.imageBox',
        thumbBox: '.thumbBox',
        spinner: '.spinner',
        imgSrc: 'avatar.png'
    }
    var cropper = new Y.cropbox(options);
    Y.one('#file').on('change', function(){
        var reader = new FileReader();
        reader.onload = function(e) {
            options.imgSrc = e.target.result;
            cropper = new Y.cropbox(options);
        }
        reader.readAsDataURL(this.get('files')._nodes[0]);
        this.get('files')._nodes = [];
    })
    Y.one('#btnCrop').on('click', function(){
        var img = cropper.getDataURL()
        Y.one('.cropped').append('<img src="'+img+'">');
    })
    Y.one('#btnZoomIn').on('click', function(){
        cropper.zoomIn();
    })
    Y.one('#btnZoomOut').on('click', function(){
        cropper.zoomOut();
    })
})

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