no-floating-decimal.js
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/**
* @fileoverview Rule to flag use of a leading/trailing decimal point in a numeric literal
* @author James Allardice
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: "disallow leading or trailing decimal points in numeric literals",
category: "Best Practices",
recommended: false
},
schema: [],
fixable: "code"
},
create(context) {
return {
Literal(node) {
if (typeof node.value === "number") {
if (node.raw.indexOf(".") === 0) {
context.report({
node,
message: "A leading decimal point can be confused with a dot.",
fix: fixer => fixer.insertTextBefore(node, "0")
});
}
if (node.raw.indexOf(".") === node.raw.length - 1) {
context.report({
node,
message: "A trailing decimal point can be confused with a dot.",
fix: fixer => fixer.insertTextAfter(node, "0")
});
}
}
}
};
}
};