order doesn't matter • Playground • Svelte

App.svelte

$: sum = a + b;

let a = 5;

$: b = a + 3;

</script>

import 'svelte/internal/disclose-version';

import 'svelte/internal/flags/legacy';

import * as $ from 'svelte/internal/client';

var root = $.template(`<h1> </h1>`);

export default function App($$anchor, $$props) {

$.push($$props, false);

const sum = $.mutable_state();

const b = $.mutable_state();

let a = 5;

$.legacy_pre_effect(() => {}, () => {

$.set(b, a + 3);

});

$.legacy_pre_effect(() => ($.get(b)), () => {

$.set(sum, a + $.get(b));

});

$.legacy_pre_effect_reset();

var h1 = root();

var text = $.child(h1);

$.reset(h1);

$.template_effect(() => $.set_text(text, `the sum of ${a ?? ''} and ${$.get(b) ?? ''} is ${$.get(sum) ?? ''}!`));

$.append($$anchor, h1);

$.pop();

}

result = svelte.compile(source, {

generate: "client" "server",

dev: false });

/* Add a <style> tag to see the CSS output */

		
			
				
					 Root {
 css: null
js: []
start: 64
end: 105
type: "Root"
fragment: Fragment {...}
 type: "Fragment"
nodes: [...] (2)
  Text {...}
 type: "Text"
start: 62
end: 64
raw: "\n\n"
data: "\n\n"
 }
 RegularElement {...}
 type: "RegularElement"
start: 64
end: 105
name: "h1"
attributes: []
fragment: Fragment {...}
 type: "Fragment"
nodes: [...] (7)
  Text {...}
 type: "Text"
start: 68
end: 79
raw: "the sum of "
data: "the sum of "
 }
 ExpressionTag {...}
 type: "ExpressionTag"
start: 79
end: 82
expression: Identifier {...}
 type: "Identifier"
start: 80
end: 81
loc:  {...}
 start:  {...}
 line: 7
column: 16
 }
end:  {...}
 line: 7
column: 17
 }
 }
name: "a"
 }
 }
 Text {...}
 type: "Text"
start: 82
end: 87
raw: " and "
data: " and "
 }
 ExpressionTag {...}
 type: "ExpressionTag"
start: 87
end: 90
expression: Identifier {...}
 type: "Identifier"
start: 88
end: 89
loc:  {...}
 start:  {...}
 line: 7
column: 24
 }
end:  {...}
 line: 7
column: 25
 }
 }
name: "b"
 }
 }
 Text {...}
 type: "Text"
start: 90
end: 94
raw: " is "
data: " is "
 }
 ExpressionTag {...}
 type: "ExpressionTag"
start: 94
end: 99
expression: Identifier {...}
 type: "Identifier"
start: 95
end: 98
loc:  {...}
 start:  {...}
 line: 7
column: 31
 }
end:  {...}
 line: 7
column: 34
 }
 }
name: "sum"
 }
 }
 Text {...}
 type: "Text"
start: 99
end: 100
raw: "!"
data: "!"
 }
 ]
 }
 }
 ]
 }
options: null
instance: Script {...}
 type: "Script"
start: 0
end: 62
context: "default"
content: Program {...}
 type: "Program"
start: 8
end: 53
loc:  {...}
 start:  {...}
 line: 1
column: 0
 }
end:  {...}
 line: 5
column: 0
 }
 }
body: [...] (3)
  LabeledStatement {...}
 type: "LabeledStatement"
start: 10
end: 25
loc:  {...}
 start:  {...}
 line: 2
column: 1
 }
end:  {...}
 line: 2
column: 16
 }
 }
body: ExpressionStatement {...}
 type: "ExpressionStatement"
start: 13
end: 25
loc:  {...}
 start:  {...}
 line: 2
column: 4
 }
end:  {...}
 line: 2
column: 16
 }
 }
expression: AssignmentExpression {...}
 type: "AssignmentExpression"
start: 13
end: 24
loc:  {...}
 start:  {...}
 line: 2
column: 4
 }
end:  {...}
 line: 2
column: 15
 }
 }
operator: "="
left: Identifier {...}
 type: "Identifier"
start: 13
end: 16
loc:  {...}
 start:  {...}
 line: 2
column: 4
 }
end:  {...}
 line: 2
column: 7
 }
 }
name: "sum"
 }
right: BinaryExpression {...}
 type: "BinaryExpression"
start: 19
end: 24
loc:  {...}
 start:  {...}
 line: 2
column: 10
 }
end:  {...}
 line: 2
column: 15
 }
 }
left: Identifier {...}
 type: "Identifier"
start: 19
end: 20
loc:  {...}
 start:  {...}
 line: 2
column: 10
 }
end:  {...}
 line: 2
column: 11
 }
 }
name: "a"
 }
operator: "+"
right: Identifier {...}
 type: "Identifier"
start: 23
end: 24
loc:  {...}
 start:  {...}
 line: 2
column: 14
 }
end:  {...}
 line: 2
column: 15
 }
 }
name: "b"
 }
 }
 }
 }
label: Identifier {...}
 type: "Identifier"
start: 10
end: 11
loc:  {...}
 start:  {...}
 line: 2
column: 1
 }
end:  {...}
 line: 2
column: 2
 }
 }
name: "$"
 }
 }
 VariableDeclaration {...}
 type: "VariableDeclaration"
start: 27
end: 37
loc:  {...}
 start:  {...}
 line: 3
column: 1
 }
end:  {...}
 line: 3
column: 11
 }
 }
declarations: [...] (1)
  VariableDeclarator {...}
 type: "VariableDeclarator"
start: 31
end: 36
loc:  {...}
 start:  {...}
 line: 3
column: 5
 }
end:  {...}
 line: 3
column: 10
 }
 }
id: Identifier {...}
 type: "Identifier"
start: 31
end: 32
loc:  {...}
 start:  {...}
 line: 3
column: 5
 }
end:  {...}
 line: 3
column: 6
 }
 }
name: "a"
 }
init: Literal {...}
 type: "Literal"
start: 35
end: 36
loc:  {...}
 start:  {...}
 line: 3
column: 9
 }
end:  {...}
 line: 3
column: 10
 }
 }
value: 5
raw: "5"
 }
 }
 ]
kind: "let"
 }
 LabeledStatement {...}
 type: "LabeledStatement"
start: 39
end: 52
loc:  {...}
 start:  {...}
 line: 4
column: 1
 }
end:  {...}
 line: 4
column: 14
 }
 }
body: ExpressionStatement {...}
 type: "ExpressionStatement"
start: 42
end: 52
loc:  {...}
 start:  {...}
 line: 4
column: 4
 }
end:  {...}
 line: 4
column: 14
 }
 }
expression: AssignmentExpression {...}
 type: "AssignmentExpression"
start: 42
end: 51
loc:  {...}
 start:  {...}
 line: 4
column: 4
 }
end:  {...}
 line: 4
column: 13
 }
 }
operator: "="
left: Identifier {...}
 type: "Identifier"
start: 42
end: 43
loc:  {...}
 start:  {...}
 line: 4
column: 4
 }
end:  {...}
 line: 4
column: 5
 }
 }
name: "b"
 }
right: BinaryExpression {...}
 type: "BinaryExpression"
start: 46
end: 51
loc:  {...}
 start:  {...}
 line: 4
column: 8
 }
end:  {...}
 line: 4
column: 13
 }
 }
left: Identifier {...}
 type: "Identifier"
start: 46
end: 47
loc:  {...}
 start:  {...}
 line: 4
column: 8
 }
end:  {...}
 line: 4
column: 9
 }
 }
name: "a"
 }
operator: "+"
right: Literal {...}
 type: "Literal"
start: 50
end: 51
loc:  {...}
 start:  {...}
 line: 4
column: 12
 }
end:  {...}
 line: 4
column: 13
 }
 }
value: 3
raw: "3"
 }
 }
 }
 }
label: Identifier {...}
 type: "Identifier"
start: 39
end: 40
loc:  {...}
 start:  {...}
 line: 4
column: 1
 }
end:  {...}
 line: 4
column: 2
 }
 }
name: "$"
 }
 }
 ]
sourceType: "module"
 }
attributes: []
 }
 }

The AST is not public API and may change at any point in time

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