Only merge on initial render

[agubler]

Type: bug

The following has been addressed in the PR:

• There is a related issue
• All code matches the style guide
• Unit or Functional tests are included in the PR

Description:

Only merge onto an existing DOM structure for the initial render

Resolves #738

[codecov]

Codecov Report

Merging #739 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #739      +/-   ##
==========================================
+ Coverage   98.42%   98.42%   +<.01%     
==========================================
  Files          30       30              
  Lines        1520     1521       +1     
  Branches      298      298              
==========================================
+ Hits         1496     1497       +1     
  Misses          7        7              
  Partials       17       17

Impacted Files	Coverage Δ
src/vdom.ts	99.56% <100%> (ø)	⬆️

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[codecov]

Codecov Report

Merging #739 into master will decrease coverage by 0.26%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #739      +/-   ##
==========================================
- Coverage   98.42%   98.16%   -0.27%     
==========================================
  Files          30       30              
  Lines        1520     1522       +2     
  Branches      298      302       +4     
==========================================
- Hits         1496     1494       -2     
- Misses          7       10       +3     
- Partials       17       18       +1

Impacted Files	Coverage Δ
src/vdom.ts	99.55% <100%> (-0.02%)	⬇️
src/mixins/Projector.ts	95.03% <0%> (-2.7%)	⬇️
src/mixins/Themed.ts	97.18% <0%> (+0.26%)	⬆️

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[matt-gadd]

lots of test changes for a 1 line change 😄

[kitsonk]

I was thinking the same thing! 😂

[agubler]

There is one new one hidden in there... honest! Silly idea to create a test group for merging 🙈