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428568 (3) [Avatar] Offline
The listing 5.25 has an error (in page 112).

watch() {
if (!this.filePath) { return this; }    
this.watcher =, (event) => {
if (event === 'change') {; }     });
return this;

in line 4 should be
. Otherwise, readers will meet error when running the program. Thanks.
Steve Kinney (33) [Avatar] Offline
Good catch! I fixed it in the manuscript. Not sure it will make the next MEAP release, but it should ship soon!