title: Units for specifying width (of a table column) in Antd?
body: <p>We are using the latest stable version 2 of <a href="https://2x.ant.design/" rel="noreferrer">Antd</a> (and cannot make the jump to version 3 due to version dependency constraints). How do we specify the width of my table columns, ideally to the length of the text in <code>title</code> property?  According to the <a href="https://2x.ant.design/components/table/" rel="noreferrer">official <code>table</code> component docu</a>, there is the obvious property <code>width</code> for a <code>column</code>. All the documentation says in English is</p>
  <blockquote>
  <p><strong>Property:</strong> width</p>
  <p><strong>Description:</strong> Width of this column</p>
  <p><strong>Type:</strong> <code>string|number</code></p>
  <p><strong>Default:</strong> -</p>
  </blockquote>
  <p>1st part of the question: <strong>If I specify only a number, what unit is used?</strong> I tried different things, but it does not really look like it is <code>dp</code> as described e.g at <a href="https://stackoverflow.com/questions/42650857/what-is-the-default-unit-for-width-height-padding-etc-in-react-native-for-ios">What is the default unit for width, height, padding etc in React Native for iOS?</a></p>
  <p>2nd part: <strong>If I specify a string, which units can I use?</strong> I tried <code>ex</code>, <code>em</code>, and <code>px</code> and none of them seems to work.</p>
  <p>The 3rd part of the question: Maybe we overlooked <strong>a property of the <code>table</code> tag which overwrites or limits the usage of <code>width</code> is a column?</strong></p>
  <p>Any input is appreciated, already the translation of the original documentation to English would help. Or explaining the a related <a href="https://github.com/ant-design/ant-design/issues/14291" rel="noreferrer">Github issue: 'how to set table columns width? the width property is invalid'</a>.</p>
  <p>Thanks for your time in advance - a puzzled Antd newbie.</p>