tools: change var to const in ./doc/html

PR-URL: #13732
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

tools/doc/html.js

@@ -33,7 +33,7 @@ module.exports = toHTML;
 const STABILITY_TEXT_REG_EXP = /(.*:)\s*(\d)([\s\S]*)/;
 
 // customized heading without id attribute
-var renderer = new marked.Renderer();
+const renderer = new marked.Renderer();
 renderer.heading = function(text, level) {
  return '<h' + level + '>' + text + '</h' + level + '>\n';
 };
@@ -42,7 +42,7 @@ marked.setOptions({
 });
 
 // TODO(chrisdickinson): never stop vomitting / fix this.
-var gtocPath = path.resolve(path.join(
+const gtocPath = path.resolve(path.join(
  __dirname,
  '..',
  '..',
@@ -57,8 +57,8 @@ var gtocData = null;
  * opts: input, filename, template, nodeVersion.
  */
 function toHTML(opts, cb) {
- var template = opts.template;
- var nodeVersion = opts.nodeVersion || process.version;
+ const template = opts.template;
+ const nodeVersion = opts.nodeVersion || process.version;
 
  if (gtocData) {
  return onGtocLoaded();
@@ -80,7 +80,7 @@ function toHTML(opts, cb) {
  }
 
  function onGtocLoaded() {
- var lexed = marked.lexer(opts.input);
+ const lexed = marked.lexer(opts.input);
  fs.readFile(template, 'utf8', function(er, template) {
  if (er) return cb(er);
  render({
@@ -123,10 +123,10 @@ function render(opts, cb) {
  var lexed = opts.lexed;
  var filename = opts.filename;
  var template = opts.template;
- var nodeVersion = opts.nodeVersion || process.version;
+ const nodeVersion = opts.nodeVersion || process.version;
 
  // get the section
- var section = getSection(lexed);
+ const section = getSection(lexed);
 
  filename = path.basename(filename, '.md');
 
@@ -138,7 +138,7 @@ function render(opts, cb) {
  buildToc(lexed, filename, function(er, toc) {
  if (er) return cb(er);
 
- var id = toID(path.basename(filename));
+ const id = toID(path.basename(filename));
 
  template = template.replace(/__ID__/g, id);
  template = template.replace(/__FILENAME__/g, filename);
@@ -220,9 +220,9 @@ function parseText(lexed) {
 // lists that come right after a heading are what we're after.
 function parseLists(input) {
  var state = null;
- var savedState = [];
+ const savedState = [];
  var depth = 0;
- var output = [];
+ const output = [];
  let headingIndex = -1;
  let heading = null;
 
@@ -353,7 +353,7 @@ function parseYAML(text) {
 }
 
 // Syscalls which appear in the docs, but which only exist in BSD / OSX
-var BSD_ONLY_SYSCALLS = new Set(['lchmod']);
+const BSD_ONLY_SYSCALLS = new Set(['lchmod']);
 
 // Handle references to man pages, eg "open(2)" or "lchmod(2)"
 // Returns modified text, with such refs replace with HTML links, for example
@@ -363,7 +363,7 @@ function linkManPages(text) {
  / ([a-z.]+)\((\d)([a-z]?)\)/gm,
  (match, name, number, optionalCharacter) => {
  // name consists of lowercase letters, number is a single digit
- var displayAs = `${name}(${number}${optionalCharacter})`;
+ const displayAs = `${name}(${number}${optionalCharacter})`;
  if (BSD_ONLY_SYSCALLS.has(name)) {
  return ` <a href="https://www.freebsd.org/cgi/man.cgi?query=${name}` +
  `&sektion=${number}">${displayAs}</a>`;
@@ -375,7 +375,7 @@ function linkManPages(text) {
 }
 
 function linkJsTypeDocs(text) {
- var parts = text.split('`');
+ const parts = text.split('`');
  var i;
  var typeMatches;
 
@@ -453,7 +453,7 @@ function buildToc(lexed, filename, cb) {
  cb(null, toc);
 }
 
-var idCounters = {};
+const idCounters = {};
 function getId(text) {
  text = text.toLowerCase();
  text = text.replace(/[^a-z0-9]+/g, '_');