Verify that it is in the image format
The code copy is as follows:
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/-cmx|image//x/-i con|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)$/i;
var Filter = /(?:bmp|cis/-cod|gif|ief|jpeg|jpeg|pipeg|png|svg/+xml|tiff|x/-cmu/-raster|x/-cmx|x/-icon|x/-portable/-anymap|x/-portable/-bitmap|x/-portable/-graymap|x/-portable/-pixmap|x/-rgb|x/-xbitmap|x/-xpixmap|x/-xwindowdump)$/i;
return rFilter.test(src) || Filter.test(src);
}
Verify that it is color
The code copy is as follows:
function detectColor(value) {
var pattern = /^#[0-9a-fA-F]{6}$/; //#XXXXXXX
var result;
var rgbRegex = /(^rgb/((/d+),/s*(/d+),/s*(/d+)/)$)|(^rgba/((/d+),/s*(/d+),/s*(/d+)(,/s*/d+/./d+)*/)$)/;
if (pattern.test(value)) {
result = value;
} else if (rgbRegex.test(value)) { //rgba(0, 0, 0, 0)
result = value;
}
return result;
}
Convert RGB to HEX:
The code copy is as follows:
function zero_fill_hex(num, digits) {
var s = num.toString(16);
while (s.length < digits) {
s = "0" + s;
}
return s;
}
function rgb2hex(rgb) {
if (rgb.charAt(0) == '#') {
return rgb;
}
var ds = rgb.split(//D+/);
var decimal = Number(ds[1]) * 65536 + Number(ds[2]) * 256 + Number(ds[3]);
return "#" + zero_fill_hex(decimal, 6);
}
Verify that it is an email address:
The code copy is as follows:
function testEmail (value, target) {
value = value.trim();
if (!/^/w+([/.-]?/w+)*@/w+([/.-]?/w+)*(/./w{2,3})+$/.test(value)) {
target.val("");
alert("Please fill in the correct E-mail address!");
}
}
Convert image src to data 64:
The code copy is as follows:
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();
}
}
The above are the commonly used js methods I have used in my recent projects. I have compiled them out and hope that my friends will like it.