39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
let topOutAt100AndValidate = (x) => {
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// return 10;
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if (x == x) {
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return x > 99 ? 99 : x < 0 ? 2 : x;
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} else {
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return 10;
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}
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};
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export const toLocale = (x) => Number(x).toLocaleString();
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export const truncateValueForDisplay = (value) => {
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let result;
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if (value > 10) {
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result = Number(Math.round(value).toPrecision(2));
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} else if (value > 1) {
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result = Math.round(value * 10) / 10;
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} else if (value > 0) {
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let candidateNumSignificantDigits =
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-Math.floor(Math.log(value) / Math.log(10)) + 1;
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let numSignificantDigits = topOutAt100AndValidate(
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candidateNumSignificantDigits
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);
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result = value.toFixed(numSignificantDigits);
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} else if (-1 < value) {
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let candidateNumSignificantDigits =
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-Math.floor(Math.log(Math.abs(value)) / Math.log(10)) + 1;
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let numSignificantDigits = topOutAt100AndValidate(
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candidateNumSignificantDigits
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);
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result = value.toFixed(numSignificantDigits);
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} else if (value <= -1) {
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result = "-" + toLocale(truncateValueForDisplay(-value));
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} else {
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result = toLocale(value); //return "~0"
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}
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return result;
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};
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