path remove fail

[Chaomingri]

path remove fail

[babel-bot]

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[JLHwung]

const ast = parser.parse("const obj = {}; obj.a = 1, obj.b = 2;");

const script_AutoCollect = {
Program(path) {
let paths = path.get("body.1.expression.expressions")
paths[0].remove()
paths[1].remove() //fail
}
}

In this case, after we remove the first expression from the sequence expression obj.a = 1, obj.b = 2, it contains only one expression, so obj.b = 2 will replace its parent because a sequence expression must contain at least two expressions, otherwise the AST is invalid. Therefore paths[1] will fail because the sequence expression is replaced by its single element.

If you want to remove the whole sequence expression, please invoke path.remove on the sequence expression.
If you want to only keep, say the element 0, 1, 3 in a sequence expression, it is recommended to replace the sequence expression with a new one, e.g, assuming path is the path to the sequence expression:

exprs = path.node.expressions;
path.replaceWith(t.sequenceExpression([ exprs[0], exprs[1], exprs[3] ]))