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App.svelte
<script>
let name = 'world';
</script>

<h1>Hello {name}!</h1>

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) {
let name = 'world';
var h1 = root();

h1.textContent = `Hello ${name ?? ''}!`;
$.append($$anchor, h1);
}
result = svelte.compile(source, {
generate: ,
});
/* Add a <style> tag to see the CSS output */
		
			
				
  • Root {
    • css: null
    • js: []
    • start: 41
    • end: 63
    • type: "Root"
    • fragment: Fragment {...}
      • type: "Fragment"
      • nodes: [...] (2)
        • Text {...}
          • type: "Text"
          • start: 39
          • end: 41
          • raw: "\n\n"
          • data: "\n\n"
          }
        • RegularElement {...}
          • type: "RegularElement"
          • start: 41
          • end: 63
          • name: "h1"
          • attributes: []
          • fragment: Fragment {...}
            • type: "Fragment"
            • nodes: [...] (3)
              • Text {...}
                • type: "Text"
                • start: 45
                • end: 51
                • raw: "Hello "
                • data: "Hello "
                }
              • ExpressionTag {...}
                • type: "ExpressionTag"
                • start: 51
                • end: 57
                • expression: Identifier {...}
                  • type: "Identifier"
                  • start: 52
                  • end: 56
                  • loc: {...}
                    • start: {...}
                      • line: 5
                      • column: 11
                      }
                    • end: {...}
                      • line: 5
                      • column: 15
                      }
                    }
                  • name: "name"
                  }
                }
              • Text {...}
                • type: "Text"
                • start: 57
                • end: 58
                • raw: "!"
                • data: "!"
                }
              ]
            }
          }
        ]
      }
    • options: null
    • instance: Script {...}
      • type: "Script"
      • start: 0
      • end: 39
      • context: "default"
      • content: Program {...}
        • type: "Program"
        • start: 8
        • end: 30
        • loc: {...}
          • start: {...}
            • line: 1
            • column: 0
            }
          • end: {...}
            • line: 3
            • column: 0
            }
          }
        • body: [...] (1)
          • VariableDeclaration {...}
            • type: "VariableDeclaration"
            • start: 10
            • end: 29
            • loc: {...}
              • start: {...}
                • line: 2
                • column: 1
                }
              • end: {...}
                • line: 2
                • column: 20
                }
              }
            • declarations: [...] (1)
              • VariableDeclarator {...}
                • type: "VariableDeclarator"
                • start: 14
                • end: 28
                • loc: {...}
                  • start: {...}
                    • line: 2
                    • column: 5
                    }
                  • end: {...}
                    • line: 2
                    • column: 19
                    }
                  }
                • id: Identifier {...}
                  • type: "Identifier"
                  • start: 14
                  • end: 18
                  • loc: {...}
                    • start: {...}
                      • line: 2
                      • column: 5
                      }
                    • end: {...}
                      • line: 2
                      • column: 9
                      }
                    }
                  • name: "name"
                  }
                • init: Literal {...}
                  • type: "Literal"
                  • start: 21
                  • end: 28
                  • loc: {...}
                    • start: {...}
                      • line: 2
                      • column: 12
                      }
                    • end: {...}
                      • line: 2
                      • column: 19
                      }
                    }
                  • value: "world"
                  • raw: "'world'"
                  }
                }
              ]
            • kind: "let"
            }
          ]
        • sourceType: "module"
        }
      • attributes: []
      }
    }
The AST is not public API and may change at any point in time
Hello world • Playground • Svelte