xrsh-com/com/isoterminal/feat/jsconsole.js

ISOTerminal.prototype.redirectConsole = function(handler){
   const log = console.log;
   const dir = console.dir;
   const err = console.error;
   const warn = console.warn;
   const addLineFeeds = (str) => str.replace(/\n/g,"\n\r")

   console.log = (...args)=>{
       const textArg = args[0];
       handler( addLineFeeds(textArg) );
       log.apply(log, args);
   };
   console.error = (...args)=>{
       const textArg = args[0]
       handler( addLineFeeds(textArg), '\x1b[31merror\x1b[0m');
       err.apply(log, args);
   };
   console.dir = (...args)=>{
       const textArg = args[0]
       let str = JSON.stringify(textArg,null,2)+'\n'
       handler( addLineFeeds(str) )
       dir.apply(log, args);
   };
   console.warn = (...args)=>{
       const textArg = args[0]
       handler( addLineFeeds(textArg),'\x1b[38;5;208mwarn\x1b[0m');
       err.apply(log, args);
   };

}

ISOTerminal.prototype.enableConsole = function(opts){

  opts = opts || {stdout:false}

  this.redirectConsole( (str,prefix) => {
    let finalStr = "";
    prefix = prefix ? prefix+' ' : ''
    str.trim().split("\n").map( (line) => {
      finalStr += `${opts.stdout ? '' : "\x1b[38;5;165m/dev/browser: \x1b[0m"}`+prefix+line+'\n'
    })
    if( opts.stdout ){
      this.emit('serial-output-string', finalStr)
    }else this.emit('append_file', ["/dev/browser/console",finalStr])
  })

  window.addEventListener('error', function(event) {
    if( event.filename ){
      console.error(event.filename+":"+event.lineno+":"+event.colno)
      console.error(event.message);
      console.error(event.error);
    }else console.error(event)
  });

  window.addEventListener('unhandledrejection', function(event) {
    console.error(event);
  });

  if( opts.stdout ){
    this.emit('serial-output-string', "\n\n\r☑ initialized javascript console\n");
    this.emit('serial-output-string', "\r☑ please use these functions to print:\n");
    this.emit('serial-output-string', "\r└☑ console.log(\"foo\")\n");
    this.emit('serial-output-string', "\r└☑ console.warn(\"foo\")\n");
    this.emit('serial-output-string', "\r└☑ console.dir({foo:12})\n");
    this.emit('serial-output-string', "\r└☑ console.error(\"foo\")\n");
    this.emit('serial-output-string', "\r\n");
  }
}

ISOTerminal.addEventListener('emulator-started', function(){
  this.enableConsole()
})

ISOTerminal.addEventListener('init', function(){
  this.addEventListener('enable-console', function(opts){
    this.enableConsole(opts.detail)
  })
})