Fix heading bug

[gchallen]

Will close #71.

[alsotang]

+1.

My environment is react native 0.57. When apply this pr, heading works

[hugotox]

+1 (RN 0.57.1)

[alsotang]

/*
There is bug in react-native-markdown-renderer with rn 0.57. So fix it with the code below.
https://github.com/mientjan/react-native-markdown-renderer/pull/79
 */
function fixMarkdownLib() {
  const applyStyle = require('react-native-markdown-renderer/src/lib/util/applyStyle.js')
  applyStyle.default = function applyStyle(children, styles, type) {
    if (!(styles instanceof Array)) {
      styles = [styles];
    }

    return children.map(child => {
      if (child.type.render.name === type) {
        return <Text key={child.key} {...child.props} style={[].concat(child.props.style, styles)} />;
      }

      return child;
    });
  }
}
fixMarkdownLib()

Currently I use the code above to fix the problem

[psegalen]

Hi! This PR should be merged because headings are not functional right now. @alsotang thanks for your fix but it works only in Debug builds, not Release ones, I guess it's not possible to modify code from the bundle at runtime in Release mode...

[alsotang]

seems we should fork a another version of this package

[alsotang]

I just fork and publish a new pkg named rnmd

https://github.com/alsotang/react-native-markdown-renderer

and I have merged this pr.

The author of react-native-markdown-renderer seems disappeared.

[psegalen]

@alsotang thanks but it (your fork with this PR merged) still doesn't work in Release builds and that's really odd! I'm digging deeper...

[psegalen]

Ok, so child.type.render.name is populated with "Text" when in Debug mode but with an empty string when in Release mode. I guess the feature was some kind of hack through React Native's structure and security has been enhanced, preventing the feature to stay functional. Debug mode Release mode

[psegalen]

Okay, I have a solution but it's not pretty ... but it works! 😅 I'll open a new PR and ref this one.

[iamacup]

I merged this pull request directly into into react-native-markdown-display here: https://github.com/iamacup/react-native-markdown-display/pull/12

in case anyone else comes accross this and needs the merged PRs, react-native-markdown-display is available on NPM