v4.0.0 (#3573)

* Remove math=strict-legacy, set default=parens-division
* Support for comma-less color functions
* Require parens after mixin call
* Output invalid JS functions in CSS
* Escape parens and revert pass-through function errors
* Remove ieCompat option
* Remove non-performant class pattern
* Add isdefined() function

.vscode/launch.json

@@ -3,14 +3,22 @@
   // Hover to view descriptions of existing attributes.
   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
-  "configurations": [
+  "configurations": [  
     {
       "type": "node",
       "request": "launch",
       "name": "Less test",
       "program": "${workspaceFolder}/packages/less/test/index.js",
       "cwd": "${workspaceFolder}/packages/less",
       "console": "integratedTerminal"
+    },
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Benchmark test",
+      "program": "${workspaceFolder}/packages/less/benchmark/index.js",
+      "cwd": "${workspaceFolder}/packages/less",
+      "console": "integratedTerminal"
     }
   ]
 }

lerna.json

@@ -3,5 +3,5 @@
     "packages/*"
   ],
   "npmClient": "npm",
-  "version": "3.13.0"
+  "version": "4.0.0"
 }

packages/less/Gruntfile.js

@@ -283,7 +283,7 @@ module.exports = function(grunt) {
         eslint: {
             target: [
                 "test/**/*.js",
-                "lib/less*/**/*.js",
+                "src/less*/**/*.js",
                 "!test/less/errors/plugin/plugin-error.js"
             ],
             options: {

packages/less/bin/lessc

@@ -554,16 +554,27 @@ function processPluginQueue() {
 
         if (checkArgFunc(arg, match[2])) {
           if (checkBooleanArg(match[2])) {
-            options.math = Constants.Math.STRICT_LEGACY;
+            options.math = Constants.Math.PARENS;
           }
         }
 
         break;
 
       case 'm':
       case 'math':
-        if (checkArgFunc(arg, match[2])) {
-          options.math = match[2];
+        var m = match[2];
+        if (checkArgFunc(arg, m)) {
+          if (m === 'always') {
+            console.warn('--math=always is deprecated and will be removed in the future.');
+            options.math = Constants.Math.ALWAYS;
+          } else if (m === 'parens-division') {
+            options.math = Constants.Math.PARENS_DIVISION;
+          } else if (m === 'parens' || m === 'strict') {
+            options.math = Constants.Math.PARENS;
+          } else if (m === 'strict-legacy') {
+            console.warn('--math=strict-legacy has been removed. Defaulting to --math=strict');
+            options.math = Constants.Math.PARENS;
+          }
         }
 
         break;

packages/less/build/rollup.js

@@ -1,6 +1,7 @@
 const rollup = require('rollup');
 const typescript = require('rollup-plugin-typescript2');
 const commonjs = require('rollup-plugin-commonjs');
+const json = require('@rollup/plugin-json');
 const resolve = require('rollup-plugin-node-resolve');
 const terser = require('rollup-plugin-terser').terser;
 const banner = require('./banner');
@@ -28,6 +29,7 @@ async function buildBrowser() {
         plugins: [
             resolve(),
             commonjs(),
+            json(),
             typescript({
                 verbosity: 2,
                 tsconfigDefaults: {