<table> <thead> <tr> <th colspan="2">The table header</th> </tr> </thead> <tbody> <tr> <td>The table body</td> <td>with two columns</td> </tr> </tbody>
The table header The table body with two columns
선언하지 않은 경우 나타나는 오류
`Warning: validateDOMNesting(...): <tr> cannot appear as a child of <table>.
Add a <tbody>, <thead> or <tfoot> to your code to match the DOM tree generated by the browser`
잘 읽고갑니다 !!