Method parse

www/js/_hyperscript.esm.js:6561–6575

(parser)

    this.args = { targetValue: target, amount: amountExpr, ...target.lhs };
  }
  static parse(parser) {
    if (!parser.matchToken("decrement")) return;
    var amountExpr;
    try {
      parser.pushFollow("by");
      var target = parser.parseElement("assignableExpression");
    } finally {
      parser.popFollow();
    }
    while (target.type === "parenthesized") target = target.expr;
    if (parser.matchToken("by")) {
      amountExpr = parser.requireElement("expression");
    }
    return new _DecrementCommand(target, amountExpr);
  }
  resolve(context, args) {
    var { targetValue, amount, ...lhs } = args;
    targetValue = targetValue ? parseFloat(targetValue) : 0;