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50 lines
953 B
50 lines
953 B
2 years ago
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var minus = "-".charCodeAt(0);
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var plus = "+".charCodeAt(0);
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var dot = ".".charCodeAt(0);
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var exp = "e".charCodeAt(0);
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var EXP = "E".charCodeAt(0);
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module.exports = function(value) {
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var pos = 0;
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var length = value.length;
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var dotted = false;
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var sciPos = -1;
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var containsNumber = false;
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var code;
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while (pos < length) {
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code = value.charCodeAt(pos);
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if (code >= 48 && code <= 57) {
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containsNumber = true;
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} else if (code === exp || code === EXP) {
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if (sciPos > -1) {
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break;
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}
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sciPos = pos;
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} else if (code === dot) {
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if (dotted) {
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break;
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}
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dotted = true;
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} else if (code === plus || code === minus) {
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if (pos !== 0) {
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break;
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}
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} else {
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break;
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}
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pos += 1;
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}
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if (sciPos + 1 === pos) pos--;
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return containsNumber
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? {
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number: value.slice(0, pos),
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unit: value.slice(pos)
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}
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: false;
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};
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