Preserve user command history (#23)

Author: timneutkens

_sandbox/index.js

@@ -6,4 +6,4 @@ export default class MyComponent extends React.Component {
   render() {
     return <div>Hello</div>
   }
-}
+}

src/output.js

@@ -3,6 +3,7 @@
 const colors = require('./utils/colors');
 const chalk = require('chalk');
 const stringLength = require('string-length');
+const readline = require('readline');
 
 class Debugger {
 
@@ -74,8 +75,12 @@ class Debugger {
   }
 
   clearConsole () {
-    if (!this.capturing && this.enabled) {
-      process.stdout.write(process.platform === 'win32' ? '\x1Bc' : '\x1B[2J\x1B[3J\x1B[H');
+    if (!this.capturing && this.enabled && process.stdout.isTTY) {
+      // Fill screen with blank lines. Then move to 0 (beginning of visible part) and clear it
+      const blank = '\n'.repeat(process.stdout.rows)
+      console.log(blank)
+      readline.cursorTo(process.stdout, 0, 0)
+      readline.clearScreenDown(process.stdout)
     }
   }