ActiveX, Flash, and Java all supplemented Javascript. none attempted to replace it. they all did things that could not be done with Javascript at the time.
only Dart attempted to replace it.
> Lars Bak led a small team to build V8, and then when that was a big success, he had enough clout within Google to design a new language that could improve on JS, so he took most of the same team and they created Dart.
How many people (original team or not) continued to work on V8? I don't know, but it felt like Dart had about 5% of the workforce that V8 did. If so, there was little chance they could have ever caught up to V8 on any measure in the short time Dart existed in Chrome as a DOM-manipulating scripting language.
only Dart attempted to replace it.
> Lars Bak led a small team to build V8, and then when that was a big success, he had enough clout within Google to design a new language that could improve on JS, so he took most of the same team and they created Dart.
How many people (original team or not) continued to work on V8? I don't know, but it felt like Dart had about 5% of the workforce that V8 did. If so, there was little chance they could have ever caught up to V8 on any measure in the short time Dart existed in Chrome as a DOM-manipulating scripting language.