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Towards ECMAScript 6 with Esprima 2 Feb 9, 2015 3 min read #es6 #esprima #javascript Little did I know that the start of my adventure with Esprima three years ago will result in something beyond my expectation. While the syntax tree format used by Esprima is not original (see SpiderMonkey Parser API), this de-facto format gains a lot of traction since it provokes a Cambrian explosion of composable
Thanks to two awesome people (Nick and Andy), for introducing me to Esprima. If you have never heard about Esprima, here is a quick intro. Esprima is a high performance, standard-compliant ECMAScript parser written in ECMAScript In simple words, Esprima is a Javascript parser. It reads a string that consists of Javascript code and makes sense of it. So where and why exactly you need a Javascript p
ECMAScript tools composable modules and transpiler infrastructure Yusuke Suzuki (a.k.a Constellation) self introduction ECMAScript engine iv / lv5 (written in C++) owner Esprima committer Escodegen owner Esmangle owner background ECMAScript everywhere ECMAScript is now widely used client side server side databases And ECMAScript tools are also developed widely ECMAScript tools tools UglifyJS closu
Writing programs to do static analysis on Javascript is easier now than ever, thanks to Esprima - the Javascript parser library. In this post, I'll demonstrate how to use Esprima to do something fairly simple - detect accidentally leaked global variables in a program. Accidentally leaked global variables happen when a value is assigned to an identifier without declaring the identifier as a variabl
EstraverseというJavaScript ASTのtraverseを行うライブラリがあります。 JavaScript ASTについては以下を参照して下さい。 JavaScript AST Walker カジュアルJavaScript AST このtraverse関数にはそれぞれのnodeの通り方としてenterとleaveというものが用意されています。 estraverse.traverse(ast, { enter: function (node, parent) { if (node.type == 'FunctionExpression' || node.type == 'FunctionDeclaration') return estraverse.VisitorOption.Skip; }, leave: function (node, parent) { if (node
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