[Vue] object data hijacking? / Two-way binding implementation/Vue responsive principle?

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Object data hijacking? / Two-way binding implementation/Vue responsive principle? Object data hijacking? / Two-way binding implementation/Vue responsive principle? Object data hijacking? / Two-way binding implementation/Vue responsive principle? Object data hijacking? / Two-way binding implementation/Vue responsive principle? Object data hijacking? / Two-way binding implementation/Vue responsive principle?