Import versioning

[dmail]

Fixes #339

Context:

• Script type module without importmap means build fall into hash cascading: https://bundlers.tooling.report/hashing/avoid-cascade/
• There is several browser supporting js module but not importmap (like chrome between 64 and 89)

This PR does the following:

• When importmap are not supported build fallback to systemjs in order to prevent hash cascading while versioning urls
• When importmap are supported build uses an importmap to version urls preventing hash cascading
• It's possible to force script type module even when importmap are not supported by passing versioningViaImportMap: false to build

Also in this PR:

• Better whitespace management when injecting nodes into html
• Disable rollup minification when minification plugin is not used
• Ensure rollup take into account runtimeCompat when generating boilerplate code
• Better output when inspecting a string containing both single and double quotes

[github-actions]

File size impact

Impact on file sizes when merging import_versioning into main.

dist (+0.4%)

Files	new size	new gzip size
dist/main.js	878 kB (+4.8 kB / +0.6%)	184 kB (+849 B / +0.5%)	↗️
dist/js/v8_coverage.js	13.7 kB (+46 B / +0.3%)	3.5 kB (+26 B / +0.7%)	↗️
dist/js/execute_using_dynamic_import.js	28.5 kB (-20 B / -0.07%)	6.5 kB (-11 B / -0.2%)	↘️
Unmodified (109)	370 kB (0 B / +0%)	108 kB (0 B / +0%)	👻
Total (112)	1.3 MB (+4.8 kB / +0.4%)	303 kB (+864 B / +0.3%)	↗️

_{Generated by @jsenv/file-size-impact during file size impact#3987110338 on 0552154}

[github-actions]

Performance impact

Impact on 32 metrics when merging import_versioning into main. Before drawing conclusion, keep in mind performance variability.

package metrics (-0.5%)

Metric	Before merge	After merge	Impact
import duration	0.1 second	0.1 second	-0.006 second / -5%	↘️
import memory heap total	4.6 MB	4.6 MB	+8.2 kB / +0.2%	↗️
import memory heap used	4.9 MB	5 MB	+15.3 kB / +0.3%	↗️
import fs read operations	0	0		👻
npm tarball size	473 kB	475 kB	+2 kB / +0.4%	↗️
npm tarball unpacked size	2.2 MB	2.2 MB	+9.8 kB / +0.4%	↗️
npm tarball file count	267	267		👻

dev server metrics (+5%)

Metric	Before merge	After merge	Impact
start duration	0.1 second	0.1 second	-0.003 second / -2%	↘️
start memory heap total	22.4 MB	22.2 MB	-254 kB / -1%	↘️
start memory heap used	5.2 MB	5.2 MB	-6 kB / -0.1%	↘️
start fs read	0	0		👻
start fs write	0	0		👻
time to app display	1 second	0.9 second	-0.05 second / -5%	↘️
serve app memory heap total	18 MB	18.8 MB	+860 kB / +5%	↗️
serve app memory heap used	14.9 MB	14.9 MB	+36.4 kB / +0.2%	↗️
serve app fs read	0	0		👻
serve app fs write	0	0		👻
time to 2nd app display	0.5 second	0.5 second	+0.007 second / +1%	↗️
2nd serve memory heap total	3 MB	4.1 MB	+1 MB / +35%	↗️
2nd serve memory heap used	1.1 MB	1.3 MB	+135 kB / +12%	↗️
2nd serve fs read	0	0		👻
2nd serve fs write	0	0		👻

build metrics (+24%)

Metric	Before merge	After merge	Impact
build duration	0.6 second	1 second	+0.4 second / +60%	↗️
build memory heap total	41.3 MB	44.1 MB	+2.7 MB / +7%	↗️
build memory heap used	23.9 MB	22.6 MB	-1.3 MB / -6%	↘️
number of fs read operation	0	0		👻
number of fs write operation	48	64	+16 / +33%	↗️

test metrics (+1%)

Metric	Before merge	After merge	Impact
test plan duration	5.5 seconds	5.4 seconds	-0.09 second / -2%	↘️
test plan memory heap total	73 MB	78 MB	+5 MB / +7%	↗️
test plan memory heap used	32.9 MB	32.9 MB	-7.3 kB / -0.02%	↘️
number of fs read operation	0	0		👻
number of fs write operation	32	32		👻

_{Generated by @jsenv/performance-impact during performance_impact#3987110351 on 0552154}

[dmail]

The following perf change

build duration | 0.6 second | 1 second | +0.4 second / +60%

is because now the build is using systemjs by default instead of js modules, which takes more time (more changes required on source code to obtain dist files)