項目中常用的JS方法整理

驗證是否為圖片格式

複製代碼代碼如下:

function IsImgType(src) {

var rFilter = /^(?: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;

var Filter = /(?: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;

return rFilter.test(src) || Filter.test(src);

}

驗證是否為顏色

複製代碼代碼如下:

function detectColor(value) {

var pattern = /^#[0-9a-fA-F]{6}$/; //#XXXXXX

var result;

var rgbRegex = /(^rgb/((/d+),/s*(/d+),/s*(/d+)/)$)|(^rgba/((/d+),/s*(/d+),/s*(/d+)(,/s*/d+/./d+)*/)$)/;

if (pattern.test(value)) {

result = value;

} else if (rgbRegex.test(value)) { //rgba(0, 0, 0, 0)

result = value;

}

return result;

}

將RGB轉化為HEX:

複製代碼代碼如下:

function zero_fill_hex(num, digits) {

var s = num.toString(16);

while (s.length < digits) {

s = "0" + s;

}

return s;

}

function rgb2hex(rgb) {

if (rgb.charAt(0) == '#') {

return rgb;

}

var ds = rgb.split(//D+/);

var decimal = Number(ds[1]) * 65536 + Number(ds[2]) * 256 + Number(ds[3]);

return "#" + zero_fill_hex(decimal, 6);

}

驗證是否為Email地址：

複製代碼代碼如下:

function testEmail (value, target) {

value = value.trim();

if (!/^/w+([/.-]?/w+)*@/w+([/.-]?/w+)*(/./w{2,3})+$/.test(value)) {

target.val("");

alert("Please fill in the correct E-mail address!");

}

}

將圖片src轉化為data 64:

複製代碼代碼如下:

function createImgData(img) {

var image = new Image();

image.src = img.src || img;

var tmpCanvas = $("<canvas></canvas>")[0];

var tmpCtx = tmpCanvas.getContext("2d");

if (tmpCanvas) {

tmpCanvas.width = image.width;

tmpCanvas.height = image.height;

tmpCtx.drawImage(image, 0, 0);

return tmpCanvas.toDataURL();

}

}

上面這些就是本人最近項目中所用到的常用的js方法了，整理出來，希望小伙伴們能夠喜歡。