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/**
* @fileoverview Rule to check spacing between template tags and their literals
* @author Jonathan Wilsson
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
type: "layout",
docs: {
description: "require or disallow spacing between template tags and their literals",
category: "Stylistic Issues",
recommended: false,
url: "https://eslint.org/docs/rules/template-tag-spacing"
},
fixable: "whitespace",
schema: [
{ enum: ["always", "never"] }
],
messages: {
unexpected: "Unexpected space between template tag and template literal.",
missing: "Missing space between template tag and template literal."
}
},
create(context) {
const never = context.options[0] !== "always";
const sourceCode = context.getSourceCode();
/**
* Check if a space is present between a template tag and its literal
* @param {ASTNode} node node to evaluate
* @returns {void}
* @private
*/
function checkSpacing(node) {
const tagToken = sourceCode.getTokenBefore(node.quasi);
const literalToken = sourceCode.getFirstToken(node.quasi);
const hasWhitespace = sourceCode.isSpaceBetweenTokens(tagToken, literalToken);
if (never && hasWhitespace) {
context.report({
node,
loc: tagToken.loc.start,
messageId: "unexpected",
fix(fixer) {
const comments = sourceCode.getCommentsBefore(node.quasi);
// Don't fix anything if there's a single line comment after the template tag
if (comments.some(comment => comment.type === "Line")) {
return null;
}
return fixer.replaceTextRange(
[tagToken.range[1], literalToken.range[0]],
comments.reduce((text, comment) => text + sourceCode.getText(comment), "")
);
}
});
} else if (!never && !hasWhitespace) {
context.report({
node,
loc: tagToken.loc.start,
messageId: "missing",
fix(fixer) {
return fixer.insertTextAfter(tagToken, " ");
}
});
}
}
return {
TaggedTemplateExpression: checkSpacing
};
}
};
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