项目中常用的JS方法整理
验证是否为图片格式
functionIsImgType(src){
varrFilter=/^(?:image\/bmp|image\/cis\-cod|image\/gif|image\/ief|image\/jpeg|image\/jpeg|image\/jpeg|image\/pipeg|image\/png|image\/svg\+xml|image\/tiff|image\/x\-cmu\-raster|image\/x\-cmx|image\/x\-icon|image\/x\-portable\-anymap|image\/x\-portable\-bitmap|image\/x\-portable\-graymap|image\/x\-portable\-pixmap|image\/x\-rgb|image\/x\-xbitmap|image\/x\-xpixmap|image\/x\-xwindowdump)$/i;
varFilter=/(?:bmp|cis\-cod|gif|ief|jpeg|jpeg|jpeg|pipeg|png|svg\+xml|tiff|x\-cmu\-raster|x\-cmx|x\-icon|x\-portable\-anymap|x\-portable\-bitmap|x\-portable\-graymap|x\-portable\-pixmap|x\-rgb|x\-xbitmap|x\-xpixmap|x\-xwindowdump)$/i;
returnrFilter.test(src)||Filter.test(src);
}
验证是否为颜色
functiondetectColor(value){
varpattern=/^#[0-9a-fA-F]{6}$/;//#XXXXXX
varresult;
varrgbRegex=/(^rgb\((\d+),\s*(\d+),\s*(\d+)\)$)|(^rgba\((\d+),\s*(\d+),\s*(\d+)(,\s*\d+\.\d+)*\)$)/;
if(pattern.test(value)){
result=value;
}elseif(rgbRegex.test(value)){//rgba(0,0,0,0)
result=value;
}
returnresult;
}
将RGB转化为HEX:
functionzero_fill_hex(num,digits){
vars=num.toString(16);
while(s.length<digits){
s="0"+s;
}
returns;
}
functionrgb2hex(rgb){
if(rgb.charAt(0)=='#'){
returnrgb;
}
vards=rgb.split(/\D+/);
vardecimal=Number(ds[1])*65536+Number(ds[2])*256+Number(ds[3]);
return"#"+zero_fill_hex(decimal,6);
}
验证是否为Email地址：
functiontestEmail(value,target){
value=value.trim();
if(!/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(value)){
target.val("");
alert("PleasefillinthecorrectE-mailaddress!");
}
}
将图片src转化为data64:
functioncreateImgData(img){
varimage=newImage();
image.src=img.src||img;
vartmpCanvas=$("<canvas></canvas>")[0];
vartmpCtx=tmpCanvas.getContext("2d");
if(tmpCanvas){
tmpCanvas.width=image.width;
tmpCanvas.height=image.height;
tmpCtx.drawImage(image,0,0);
returntmpCanvas.toDataURL();
}
}
上面这些就是本人最近项目中所用到的常用的js方法了，整理出来，希望小伙伴们能够喜欢。