UpdateExpression() — svelte Function Reference

Architecture documentation for the UpdateExpression() function in UpdateExpression.js from the svelte codebase.

Function javascript Compiler Transformer calls 2 called by 1

Entity Profile

Compiler→ Transformer→ UpdateExpression() — svelte Function Reference

Dependency Diagram

graph TD
  05215418_7b1e_a936_d190_16d901793aae["UpdateExpression()"]
  f9172498_1705_28e2_3e27_64d084b5e682["UpdateExpression.js"]
  05215418_7b1e_a936_d190_16d901793aae -->|defined in| f9172498_1705_28e2_3e27_64d084b5e682
  aced5321_4478_4f67_ba8c_e122713c1d9f["calculate_blockers()"]
  aced5321_4478_4f67_ba8c_e122713c1d9f -->|calls| 05215418_7b1e_a936_d190_16d901793aae
  5ebdf508_43c0_4c5b_b633_950058ffd709["validate_assignment()"]
  05215418_7b1e_a936_d190_16d901793aae -->|calls| 5ebdf508_43c0_4c5b_b633_950058ffd709
  804afe56_25d1_9f41_dafe_adc75e952134["object()"]
  05215418_7b1e_a936_d190_16d901793aae -->|calls| 804afe56_25d1_9f41_dafe_adc75e952134
  style 05215418_7b1e_a936_d190_16d901793aae fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/phases/2-analyze/visitors/UpdateExpression.js lines 10–29

export function UpdateExpression(node, context) {
	validate_assignment(node, node.argument, context);

	if (context.state.reactive_statement) {
		const id = node.argument.type === 'MemberExpression' ? object(node.argument) : node.argument;
		if (id?.type === 'Identifier') {
			const binding = context.state.scope.get(id.name);

			if (binding) {
				context.state.reactive_statement.assignments.add(binding);
			}
		}
	}

	if (context.state.expression) {
		context.state.expression.has_assignment = true;
	}

	context.next();
}