Use ESM

Author: wooorm

.gitignore

@@ -1,6 +1,5 @@
 .DS_Store
 *.log
-.nyc_output/
 coverage/
 node_modules/
 yarn.lock

.prettierignore

@@ -1,4 +1,3 @@
 coverage/
 *.html
-*.json
 *.md

index.js

@@ -1,19 +1,14 @@
-'use strict'
-
-module.exports = toMdast
-
-var has = require('hast-util-has-property')
-var minify = require('rehype-minify-whitespace')
-var convert = require('unist-util-is/convert')
-var visit = require('unist-util-visit')
-var xtend = require('xtend')
-var one = require('./lib/one')
-var handlers = require('./lib/handlers')
-var own = require('./lib/util/own')
+import {hasProperty} from 'hast-util-has-property'
+import minify from 'rehype-minify-whitespace'
+import {convert} from 'unist-util-is'
+import {visit} from 'unist-util-visit'
+import {one} from './lib/one.js'
+import {handlers} from './lib/handlers/index.js'
+import {own} from './lib/util/own.js'
 
 var block = convert(['heading', 'paragraph', 'root'])
 
-function toMdast(tree, options) {
+export function toMdast(tree, options) {
   var settings = options || {}
   var byId = {}
   var mdast
@@ -24,7 +19,9 @@ function toMdast(tree, options) {
   h.wrapText = true
   h.qNesting = 0
 
-  h.handlers = settings.handlers ? xtend(handlers, settings.handlers) : handlers
+  h.handlers = settings.handlers
+    ? {...handlers, ...settings.handlers}
+    : handlers
   h.augment = augment
 
   h.document = settings.document
@@ -54,7 +51,7 @@ function toMdast(tree, options) {
       props = {}
     }
 
-    result = xtend({type: type}, props)
+    result = {type, ...props}
 
     if (typeof children === 'string') {
       result.value = children
@@ -76,7 +73,7 @@ function toMdast(tree, options) {
   }
 
   function onelement(node) {
-    var id = has(node, 'id') && String(node.properties.id).toUpperCase()
+    var id = hasProperty(node, 'id') && String(node.properties.id).toUpperCase()
 
     if (id && !own.call(byId, id)) {
       byId[id] = node

lib/all.js

@@ -1,10 +1,6 @@
-'use strict'
+import {one} from './one.js'
 
-module.exports = all
-
-var one = require('./one')
-
-function all(h, parent) {
+export function all(h, parent) {
   var nodes = parent.children || []
   var values = []
   var index = -1

lib/handlers/link.js renamed to lib/handlers/a.js

@@ -1,11 +1,7 @@
-'use strict'
+import {all} from '../all.js'
+import {resolve} from '../util/resolve.js'
 
-module.exports = link
-
-var all = require('../all')
-var resolve = require('../util/resolve')
-
-function link(h, node) {
+export function a(h, node) {
   return h(
     node,
     'link',

lib/handlers/base.js

@@ -1,8 +1,4 @@
-'use strict'
-
-module.exports = base
-
-function base(h, node) {
+export function base(h, node) {
   if (!h.baseFound) {
     h.frozenBaseUrl = node.properties.href
     h.baseFound = true

lib/handlers/blockquote.js

@@ -1,9 +1,5 @@
-'use strict'
+import {wrapChildren} from '../util/wrap-children.js'
 
-module.exports = blockquote
-
-var wrapChildren = require('../util/wrap-children')
-
-function blockquote(h, node) {
+export function blockquote(h, node) {
   return h(node, 'blockquote', wrapChildren(h, node))
 }

lib/handlers/break.js renamed to lib/handlers/br.js

@@ -1,7 +1,3 @@
-'use strict'
-
-module.exports = br
-
-function br(h, node) {
+export function br(h, node) {
   return h.wrapText ? h(node, 'break') : h(node, 'text', ' ')
 }

lib/handlers/code.js

@@ -1,27 +1,26 @@
-'use strict'
-
-module.exports = code
-
-var has = require('hast-util-has-property')
-var convert = require('hast-util-is-element/convert')
-var toText = require('hast-util-to-text')
-var trim = require('trim-trailing-lines')
-var wrapText = require('../util/wrap-text')
+import {hasProperty} from 'hast-util-has-property'
+import {convertElement} from 'hast-util-is-element'
+import {toText} from 'hast-util-to-text'
+import {trimTrailingLines} from 'trim-trailing-lines'
+import {wrapText} from '../util/wrap-text.js'
 
 var prefix = 'language-'
 
-var pre = convert('pre')
-var isCode = convert('code')
+var pre = convertElement('pre')
+var isCode = convertElement('code')
 
-function code(h, node) {
+export function code(h, node) {
   var children = node.children
   var index = -1
   var classList
   var lang
 
   if (pre(node)) {
     while (++index < children.length) {
-      if (isCode(children[index]) && has(children[index], 'className')) {
+      if (
+        isCode(children[index]) &&
+        hasProperty(children[index], 'className')
+      ) {
         classList = children[index].properties.className
         break
       }
@@ -43,6 +42,6 @@ function code(h, node) {
     node,
     'code',
     {lang: lang || null, meta: null},
-    trim(wrapText(h, toText(node)))
+    trimTrailingLines(wrapText(h, toText(node)))
   )
 }

lib/handlers/comment.js

@@ -1,9 +1,5 @@
-'use strict'
+import {wrapText} from '../util/wrap-text.js'
 
-module.exports = comment
-
-var wrapText = require('../util/wrap-text')
-
-function comment(h, node) {
+export function comment(h, node) {
   return h(node, 'html', '<!--' + wrapText(h, node.value) + '-->')
 }