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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: {
- start: tagToken.loc.end,
- end: literalToken.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: {
- start: node.loc.start,
- end: literalToken.loc.start
- },
- messageId: "missing",
- fix(fixer) {
- return fixer.insertTextAfter(tagToken, " ");
- }
- });
- }
- }
-
- return {
- TaggedTemplateExpression: checkSpacing
- };
- }
- };
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